维普中文期刊产品整合服务
20篇 您的检索式:作者名="Shufang Guo"
    题名 作者 年代 出处 被引量
1Litter decomposition and C and N dynamics as affected by N additions in a semi-arid temperate steppe, Inner Mongolia of China显示文摘Litter decomposition is the fundamental process in nutrient cycling and soil carbon(C) sequestration in terrestrial ecosystems. The global-wide increase in nitrogen(N) inputs is expected to alter litter decomposition and,ultimately, affect ecosystem C storage and nutrient status. Temperate grassland ecosystems in China are usually N-deficient and particularly sensitive to the changes in exogenous N additions. In this paper, we conducted a 1,200-day in situ experiment in a typical semi-arid temperate steppe in Inner Mongolia to investigate the litter decomposition as well as the dynamics of litter C and N concentrations under three N addition levels(low N with 50 kg N/(hm2?a)(LN), medium N with 100 kg N/(hm2?a)(MN), and high N with 200 kg N/(hm2?a)(HN)) and three N addition forms(ammonium-N-based with 100 kg N/(hm2?a) as ammonium sulfate(AS), nitrate-N-based with 100 kg N/(hm2?a) as sodium nitrate(SN), and mixed-N-based with 100 kg N/(hm2?a) as calcium ammonium nitrate(CAN)) compared to control with no N addition(CK). The results indicated that the litter mass remaining in all N treatments exhibited a similar decomposition pattern: fast decomposition within the initial 120 days, followed by a relatively slow decomposition in the remaining observation period(120–1,200 days). The decomposition pattern in each treatment was fitted well in two split-phase models, namely, a single exponential decay model in phase I(<398 days) and a linear decay function in phase II(≥398 days). The three N addition levels exerted insignificant effects on litter decomposition in the early stages(<398 days, phase I; P>0.05). However, MN and HN treatments inhibited litter mass loss after 398 and 746 days, respectively(P<0.05). AS and SN treatments exerted similar effects on litter mass remaining during the entire decomposition period(P>0.05). The effects of these two N addition forms differed greatly from those of CAN after 746 and 1,053 days, respectively(P<0.05). During the decomposition period, N concentrations in the decomposing litter increased whereas C concentrations decreased, which also led to an exponential decrease in litter C:N ratios in all treatments. No significant effects were induced by N addition levels and forms on litter C and N concentrations(P>0.05). Our results indicated that exogenous N additions could exhibit neutral or inhibitory effects on litter decomposition, and the inhibitory effects of N additions on litter decomposition in the final decay stages are not caused by the changes in the chemical qualities of the litter, such as endogenous N and C concentrations. These results will provide an important data basis for the simulation and prediction of C cycle processes in future N-deposition scenarios.Qin PENG YuChun QI YunShe DONG YaTing HE ShengSheng XIAO XinChao LIU LiangJie SUN JunQiang JIA ShuFang GUO CongCong CAO 2014Journal of Arid Land2014,6,4:16
2Aging Precipitation Behavior and Mechanical Properties of Inconel 617 Superalloy显示文摘Aging precipitation behavior and mechanical properties of Inconel 617 superalloy aged at 760 ℃ for up to 10000 h were investigated. The results showed that the precipitates of the aged alloy are M23C6 and M6C carbides and γ phase. The carbide particles precipitated both at the grain boundaries and within grains, and the γ phase particles were situated at intragranular sites in the process of aging. The carbide particles were discontinuously dispersed at grain boundaries after aging for 3000 h, while after aged for 5000 h the carbide particles are merged. The precipitates inside grains remained stable even after aging for 10000 h. The hardness was increased for the alloy aged for 300 h up to 3000 h, which was resulted primarily from the precipitation of carbides as discrete particles both at the grain boundaries and inside grains. Small quantity γ precipitates were formed inside grains, to some extent, which contributed to an enhanced hardness. However, a decrease of the hardness was observed after aging for 5000 h. A significant drop in toughness of the alloy aged for 300 h was attributed to the reduction of the bonding interface strength when carbides precipitated at grain boundaries. Thereafter, the toughness decreased slowly with the prolonged aging time. The high temperature tensile properties of the aged alloy are rather stable even aged for 300-3000 h.Yan GUO Bohan WANG Shufang HOU 2013Acta Metallurgica Sinica(English Letters)2013,26,3:12
3Influences of drip and flood irrigation on soil carbon dioxide emission and soil carbon sequestration of maize cropland in the North China Plain显示文摘The need is pressing to investigate soil CO_2(carbon dioxide) emissions and soil organic carbon dynamics under water-saving irrigation practices in agricultural systems for exploring the potentials of soil carbon sequestration. A field experiment was conducted to compare the influences of drip irrigation(DI) and flood irrigation(FI) on soil organic carbon dynamics and the spatial and temporal variations in CO_2 emissions during the summer maize growing season in the North China Plain using the static closed chamber method. The mean CO_2 efflux over the growing season was larger under DI than that under FI. The cumulative CO_2 emissions at the field scale were 1959.10 and 1759.12 g/m^2 under DI and FI, respectively. The cumulative CO_2 emission on plant rows(OR) was larger than that between plant rows(BR) under FI, and the cumulative CO2 emission on the irrigation pipes(OP) was larger than that between irrigation pipes(BP) under DI. The cumulative CO_2 emissions of OP, BP and bare area(BA) under DI were larger than those of OR, BR and BA under FI, respectively. Additionally, DI promoted root respiration more effectively than FI did. The average proportion of root respiration contributing to the soil CO_2 emissions of OP under DI was larger than that of OR under FI. A general conclusion drawn from this study is that soil CO_2 emission was significantly influenced by the soil water content, soil temperature and air temperature under both DI and FI. Larger concentrations of dissolved organic carbon(DOC), microbial biomass carbon(MBC) and total organic carbon(TOC) were observed under FI than those under DI. The observed high concentrations(DOC, MBC, and TOC) under FI might be resulted from the irrigation-associated soil saturation that in turn inhibited microbial activity and lowered decomposition rate of soil organic matter. However, DI increased the soil organic matter quality(the ratio of MBC to TOC) at the depth of 10–20 cm compared with FI. Our results suggest that the transformation from conventional FI to integrated DI can increase the CO2 emissions and DI needs to be combined with other management practices to reduce the CO_2 emissions from summer maize fields in the North China Plain.GUO Shufang QI Yuchun PENG Qin DONG Yunshe HE Yunlong YAN Zhongqing WANG Liqin 2017Journal of Arid Land2017,9,2:5
4Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe显示文摘High nitrous oxide(N2O) emissions during freeze-thawing period(FTP) have been observed in many different ecosystems. However, the knowledge about the dynamic of soil N_2O emissions and its main driving mechanism during the freeze-thawing processes in grassland ecosystem is still limited. An in-situ experiment was conducted during the FTP on the sites with 0 and 15% surplus of the average rainfall and two levels of N addition(0,10 g N/(m^2·year)) during growing season(marked as W0N0, W15N0, W0N10, W15N10, respectively) to explore the effects of water and N background on soil N_2O emissions during FTPs and the relationship between soil N_2O emissions and environmental factors. The results indicated that water and N treatments conducted during growing season did not show significant effect on the N_2O effluxes of FTP, but the soil mineral N contents of W0N10 treatment were significantly higher than those of W0N0, W15N0, W15N10treatments(p < 0.05). The soil PLFA concentrations of microbial groups monitored during 2015 spring freeze-thawing period(2015S-FTP) were lower than those during winter freeze-thawing period of 2014(2014W-FTP), while cumulative soil N_2O emissions of 2015S-FTP were higher than those of 2014W-FTP. The correlations between soil N_2O effluxes and most of the measured environmental factors were insignificant, multiple stepwise regression analysis indicated that the soil temperature, soil NH_4^+-N content and air temperature were the major environmental factors which significantly influenced the N_2O effluxes during 2014W-FTP, and air temperature and soil water content were the significant influencing factors during 2015S-FTP.Liqin Wang Yuchun Qi Yunshe Dong qin Peng Shufang Guo Yunlong He Zhaolin Li 2017Journal of Environmental Sciences2017,29,6:4
5Charge transfer accelerates galvanic replacement for PtAgAu nanotubes with enhanced catalytic activity显示文摘流电的代替,为生产空金属性的 nanostructures 的流行策略之一,在过去享受了大成功。然而,尽管这些 nanoparticles 能与控制得好的尺寸,形状,和结构被生产,它很少与 Au nanoparticles 被用作 self-sacrificed 模板。这里,从核心壳 Au@Ag nanorods 的 Ag 和 Au 被表明为生产空 nanostructures 涉及流电的代替。金属性的 Au 的提高的氧化能从 Au 被归因于在 Au 和 Ag 和唯一的费用赔偿之间的靠近的接触到 Ag,哪个为经由流电的代替蚀刻 Au 是不可缺少的。由于这反应,这些二金属的 nanorods 经验从 nanorattles 的结构的进化到尖端空的 nanorods,并且最后到多孔的 nanotubes。nanotubes 展览高度在蚁的酸的 electrooxidation 的催化活动。这些结果不仅揭示金属性的 Au 能被在温和条件下面代替的内在的机制,而且为流电的代替扩展 self-sacrificed 模板的选择,它是在许多应用的重要反应。Hongyan Sun Xia Guo Wei Ye Shufang Kou Jian Yang 2016Nano Research2016,9,4:2
6Anomaly detection in smart grid based on encoder-decoder framework with recurrent neural network显示文摘Anomaly detection in smart grid is critical to enhance the reliability of power systems.Excessive manpower has to be involved in analyzing the measurement data collected from intelligent motoring devices while performance of anomaly detection is still not satisfactory.This is mainly because the inherent spatio-temporality and multi-dimensionality of the measurement data cannot be easily captured.In this paper,we propose an anomaly detection model based on encoder-decoder framework with recurrent neural network(RNN).In the model,an input time series is reconstructed and an anomaly can be detected by an unexpected high reconstruction error.Both Manhattan distance and the edit distance are used to evaluate the difference between an input time series and its reconstructed one.Finally,we validate the proposed model by using power demand data from University of California,Riverside(UCR) time series classification archive and IEEE 39 bus system simulation data.Results from the analysis demonstrate that the proposed encoder-decoder framework is able to successfully capture anomalies with a precision higher than 95%.Zheng Fengming Li Shufang Guo Zhimin Wu Bo Tian Shiming Pan Mingming 2017The Journal of China Universities of Posts and Telecommunications2017,24,6:2
7Short-cut nitrification in biological aerated filters with modified zeolite and nitrifying sludge显示文摘Qiang Li Shifang Sun Tingfeng Guo Chao Yang Cunjiang Song Weitao Geng Wei Zhang Jun Feng Shufang Wang 2013Bioresource Technology2013,,:1
8Evaluation of biodegradable microspheres containingnomegestrol acetate in a rat model of endometriosis显示文摘Jianfeng Zhang Yan Zhu Xianying Zhou Shufang Hao ShuwuXie Jieyun Zhou Xiangjie Guo Zhao Li Yunsheng Huang QinghuaChen 2014EuropeanJournal of Pharmaceutical Sciences2014,65,:1
9Glutamic acid independent production of poly-γ-glutamic acid by Bacillus amyloliquefaciens LL3 and cloning of pgsBCA genes显示文摘Mingfeng Cao Weitao Geng Li Liu Cunjiang Song Hui Xie Wenbin Guo Yinghong Jin Shufang Wang 2010Bioresource Technology2010,,5:1
10Effects of reaction time on the morphological, structural, and gas sensing properties of ZnO nanostructures显示文摘Shahid Hussain Tianmo Liu M. Kashif Liyang Lin Shufang Wu Weiwei Guo Wen Zeng U. Hashim 2014Materials Science in Semiconductor Processing2014,,:1
11DCLK1 autoinhibition and activation in tumorigenesis显示文摘Doublecortin-like kinase 1(DCLK1)is upregulated in many tumors and is a marker for tumor stem cells.Accumulating evidence suggests DCLK1 constitutes a promising drug target for cancer therapy.However,the regulation of DCLK1 kinase activity is poorly understood,particularly the function of its autoinhibitory domain(AID),and,moreover,no physiological activators of DCLK1 have presently been reported.Here we determined the first DCLK1 kinase structure in the autoinhibited state and identified the neuronal calcium sensor HPCAL1 as an activator of DCLK1.The C-terminal AID functions to block the ATP-binding site and is competitive with ATP.HPCAL1 binds directly to the AID in a Ca^(2+)-dependent manner,which releases the autoinhibition.We also analyzed cancer-associated mutations occurring in the AID and elucidate how these mutations disrupt DCLK1 autoinhibition to elicit kinase activity upregulation.Our results present a molecular mechanism for autoinhibition and activation of DCLK1 kinase activity and provide insights into DCLK1-associated tumorigenesis.Linna Cheng Zejing Yang Wenhao Guo Chengyong Wu Shufang Liang Aiping Tong Zhongwei Cao Rick F.Thorne Sheng-Yong Yang Yamei Yu Qiang Chen 2022The Innovation2022,3,1:1
12Ca2+ and aminoguanidine on γ-aminobutyric acid accumulation in germinatingsoybean under hypoxia-NaCl stress显示文摘YANG Runqiang GUO Yuanxin WANG Shufang 2015Journal of Food and Drug Analysis2015,23,2:1
13Effects of water and nitrogen addition on vegetation carbon pools in a semi-arid temperate steppe显示文摘Global change will lead to increases in regional precipitation and nitrogen(N) deposition in the semi-arid grasslands of northern China. We investigated the responses of vegetation carbon(C) pools to simulated precipitation and N deposition increases through field experiments in a typical steppe in Inner Mongolia. The treatments included NH_4NO_3 addition at concentrations of 0(CK), 5(LN, low nitrogen), 10(middle nitrogen, MN), and 20(HN,high nitrogen)(g m^(-2)a^(-1)) with and without water. After three consecutive years of treatment, from 2010 to 2012,water addition did not significantly change the size of the total vegetation C pools, but it significantly decreased the ratio of root:shoot(R:S)(P = 0.05) relative to controls. By contrast, N addition significantly increased the total vegetation C pools. The C pools in the LN, MN and HN treatments increased by 22, 39 and 44 %, respectively. MN produced the largest effect among the N concentrations,although differences between N-added treatments were not significant(P [ 0.05). N addition significantly reduced the ratio of root:shoot(R:S)(P = 0.03). However, there were no significant interactive effects of water and N addition on the vegetation C pools.Junqiang Jia Yunshe Dong Yuchun Qi Qin Peng Xinchao Liu Liangjie Sun Shufang Guo Yunlong He Congcong Cao Zhongqing Yan 2016Journal of Forestry Research2016,27,3:1
14Progressive Neuronal Degeneration of Childhood with Liver's Disease (Alpers' Disease) Clinical Features and Neuropathological Studies of 4 Sibling显示文摘We report four siblings of a family with Alpers' disease. Three of four siblings occurred diarrhea and myoclonus at the ages of 7 to 8 years old. During the disease evolution, symptoms of subacute encephalopathy such as headache, visual disturbance, cortical blindness, progressive seizures and mental retardation were presented at the ages of 15 to 20 years old. Downhill progression led them to death in multiple organ failure within six to eight months of onset. CT showed hypodensity lesions in the bilateral oc cipital and temporal lobes. Spongiform changes, which characterized by diffuse neuronal degeneration or loss and astrocytosis, were most severe in the gray matter. White matter was slightly involved, while basal ganglia, pons, brain stem and cerebellum were not involved. Physical examination of the only live brother of the four siblings showed short status (165 cm), arched feet and improper nose-pointed test of the left side. Muscle biopsy of him showed a large amount of Red-Ragged (RR) fibers and abnormal mitochondria. Clinical features and pathological findings of autopsy in all the four siblings were consistent with progressive neuronal degeneration of childhood with liver disease (PNDC) - Alpers' disease. The muscle biopsy showed the characteristic findings of mitochondrial myopathy. Our report confirmed the classification of late onset Alpers' disease as a mitochondrial disorders.Yupu Guo Zhong Guo Haowen Liu Mingwe Wang Hongwei Duan Shufang Gao Haitao Ren 2000中国临床神经科学2000,8,z1:1
15Check dam extraction from remote sensing images using deep learning and geospatial analysis:A case study in the Yanhe River Basin of the Loess Plateau,China显示文摘Check dams are widely used on the Loess Plateau in China to control soil and water losses,develop agricultural land,and improve watershed ecology.Detailed information on the number and spatial distribution of check dams is critical for quantitatively evaluating hydrological and ecological effects and planning the construction of new dams.Thus,this study developed a check dam detection framework for broad areas from high-resolution remote sensing images using an ensemble approach of deep learning and geospatial analysis.First,we made a sample dataset of check dams using GaoFen-2(GF-2)and Google Earth images.Next,we evaluated five popular deep-learning-based object detectors,including Faster R-CNN,You Only Look Once(version 3)(YOLOv3),Cascade R-CNN,YOLOX,and VarifocalNet(VFNet),to identify the best one for check dam detection.Finally,we analyzed the location characteristics of the check dams and used geographical constraints to optimize the detection results.Precision,recall,average precision at intersection over union(IoU)threshold of 0.50(AP_(50)),IoU threshold of 0.75(AP_(75)),and average value for 10 IoU thresholds ranging from 0.50-0.95 with a 0.05 step(AP_(50-95)),and inference time were used to evaluate model performance.All the five deep learning networks could identify check dams quickly and accurately,with AP_(50-95),AP_(50),and AP_(75)values higher than 60.0%,90.0%,and 70.0%,respectively,except for YOLOv3.The VFNet had the best performance,followed by YOLOX.The proposed framework was tested in the Yanhe River Basin and yielded promising results,with a recall rate of 87.0%for 521 check dams.Furthermore,the geographic analysis deleted about 50%of the false detection boxes,increasing the identification accuracy of check dams from 78.6%to 87.6%.Simultaneously,this framework recognized 568 recently constructed check dams and small check dams not recorded in the known check dam survey datasets.The extraction results will support efficient watershed management and guide future studies on soil erosion in the Loess Plateau.SUN Liquan GUO Huili CHEN Ziyu YIN Ziming FENG Hao WU Shufang Kadambot H M SIDDIQUE 2023Journal of Arid Land2023,15,1:0
16Protocol for Brain Magnetic Resonance Imaging and Extraction of Imaging‑Derived Phenotypes from the China Phenobank Project显示文摘Imaging-derived phenotypes(IDPs)have been increasingly used in population-based cohort studies in recent years.As widely reported,magnetic resonance imaging(MRI)is an important imaging modality for assessing the anatomical structure and function of the brain with high resolution and excellent soft-tissue contrast.The purpose of this article was to describe the imaging protocol of the brain MRI in the China Phenobank Project(CHPP).Each participant underwent a 30-min brain MRI scan as part of a 2-h whole-body imaging protocol in CHPP.The brain imaging sequences included T1-magnetization that prepared rapid gradient echo,T2 fuid-attenuated inversion-recovery,magnetic resonance angiography,difusion MRI,and resting-state functional MRI.The detailed descriptions of image acquisition,interpretation,and post-processing were provided in this article.The measured IDPs included volumes of brain subregions,cerebral vessel geometrical parameters,microstructural tracts,and function connectivity metrics.Chengyan Wang Zhang Shi Yan Li Xueqin Xia Xutong Kuang Shufang Qian Le Xue Lizhen Lan Yudan Wu Na Zhang Ji Tao Xumei Hu Wenzhao Cao Naying He Yike Guo Weibo Chen Jun Zhang Jingchun Luo He Wang Mei Tian 2023Phenomics2023,3,6:0
17THERMAL PROPERTY, MISCIBILITY AND CRYSTALLIZATION BEHAVIOR OF POLY(3-HYDROXYBUTYRATE-co-3-YDROXYHEXANOATE) AND POLY(BUTYLENE SUCCINATE-ADIPATE) (PHBHHX/PBSA) BLENDS显示文摘Blends of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and poly(butylene succinate-adipate) (PBSA), both biodegradable semicrystalline polyesters, were prepared with the ratio of PHBHHx/PBSA ranging from 80/20 to 20/80 by melt mixing method. Differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), dynamic mechanical thermal analysis (DMA), polarizing optical microscopy (POM) and wide angle X-ray diffractometer (WAXD) were used to study the miscibility and crystallization behavior of PHBHHx/PBSA blends. Experimental results indicate that PHBHHx is immiscible with PBSA as shown by the almost unchanged glass transition temperature and the biphasic melt.WANG Shufang GUO Tianying TAO Jian ZHENG Chenggang ZHANG Banghua SONG Cunjiang 2005Chinese Journal of Reactive Polymers2005,14,1:0
18Organic Passivation of Deep Defects in Cu(In,Ga)Se_(2) Film for Geometry-Simplified Compound Solar Cells显示文摘Diverse defects in copper indium gallium diselenide solar cells cause nonradiative recombination losses and impair device performance.Here,an organic passivation scheme for surface and grain boundary defects is reported,which employs an organic passivation agent to infiltrate the copper indium gallium diselenide thin films.A transparent conductive passivating(TCP)film is then developed by incorporating metal nanowires into the organic polymer and used in solar cells.The TCP films have a transmittance of more than 90%in the visible and nearinfrared spectra and a sheet resistance of~10.5Ω/sq.This leads to improvements in the open-circuit voltage and the efficiency of the organic passivated solar cells compared with control cells and paves the way for novel approaches to copper indium gallium diselenide defect passivation and possibly other compound solar cells.Jingwei Chen Xuan Chang Jianxin Guo Qing Gao Xuning Zhang Chenxu Liu Xueliang Yang Xin Zhou Bingbing Chen Feng Li Jianming Wang Xiaobing Yan Dengyuan Song Han Li Benjamin S.Flavel Shufang Wang Jianhui Chen 2023Research2023,,4:0
19Correlative Measurements of Fission Fragments and Light Particles(α,p)in Reactions of ^(40)Ar+^(209)Bi,^(nat)Ag at 25MeV/u显示文摘Correlative Measurements of Fission Fragments and Light Particles(α,p)in Reactions of ^(40)Ar+^(209)Bi,^(nat)Ag at 25MeV/u¥WuE?..Wu Enjiu Jing Genming Yin Shuzhi Zheng Jiwen Tan Jilian Song Mintao Jin Weiyang Zhang Chun Li Zhuyu Wu Heyu Guo Zhongyan Wang Shufang He Zhiyong Jiang Dongxing and Qian Xing 1994IMP & HIRFL Annual Report1994,,0:0
20Environmental benefits and farmers' adoption of winter cover crops in the North China Plain显示文摘The introduction of cover crops into monoculture systems to improve soil health has been widely adopted worldwide. However, little is known about the environmental risks and application prospects of different cover crops in spring maize(Zea mays L.) monocultures proposed in the North China Plain. A pot experiment was conducted to evaluate the effects of different winter cover crops on subsequent maize yield, soil fertility, and environmental risks of nitrogen(N) loss, and a questionnaire survey was conducted to examine factors influencing farmers' willingness to adopt cover crops in the North China Plain. Based on the same fertilization regime during the maize growing period, four winter cover crop treatments were set up, including bare fallow, hairy vetch(Vicia villosa Roth.), February orchid(Orychophragmus violaceus), and winter oilseed rape(Brassica campestris L.). The results indicated that winter cover crops significantly increased subsequent maize yield and soil organic carbon, total N, and microbial biomass carbon and N compared with the bare fallow treatment.The incorporation of cover crops led to a negligible increase in nitrous oxide(N_(2)O) emissions and had a very limited effect on ammonia(NH_(3)) emissions.The incorporation of February orchid and winter oilseed rape decreased nitrate leaching compared with the hairy vetch treatment in the maize growing season.The N losses via N_(2)O and NH_(3) emissions and N leaching accounted for 71%–84% of the N surplus. However, yield increase and environmental benefits were not the main positive factors for farmers to accept cover crops. Financial incentive was rated by 83.9% of farmers as an “extremely important” factor, followed by other costs, when considering winter cover cropping. These results indicate that the environmental benefits depend on the type of cover crop. Maintaining high levels of soil fertility and maize yield, providing sufficient subsidies, and encouraging large-area cultivation of cover crops are critical measures to promote winter cover cropping in the North China Plain.Shufang GUO Yitao ZHANG Limei ZHAI Jian LIU Hongyuan WANG Hongbin LIU 2024Pedosphere2024,34,1:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费