1Current situation of establishment of river chief offices in China and suggestions for improvementChen Jian, Wang Xiaohui, Cai Guoyu, Liu XufangRiver and Lake Management4-7,32Practice and path exploration of river chief system boosting river basin ecological managementJing Xiaodong, Tian GuiliangRiver and Lake Management8-10,173Construction of joint prevention and control mechanism for transboundary rivers and lakes under the river chief systemTang Jian, Xu Yongjiang, Jing Zheng, Li XiaomengRiver and Lake Management11-144The positive role and optimization method of river chief system in cross-regional water resources cooperative governanceYang Yi, Zhou Congying, Zhang XiongRiver and Lake Management15-175Exploration and practice of rivers and lakes demarcation in Liaoning ProvinceYang BinbinRiver and Lake Management18-19,226Discussion on the construction of "Model beautiful rivers and lakes" in Jinan CityDu Wei, Chen XiaoyanRiver and Lake Management20-227Research on dual prevention mechanism of risk hierarchical management and control as well as hidden trouble detection and control——take the South-to-North Water Diversion Middle Route Project as an exampleXu Zhichao, Liu Jie, Yang Wentao, Gu ShengfengSouth-to-North Water Diversion Project25-278Test of steel pipe welding process for PCCP pipe replacement of South-to-North Water Diversion Middle Route ProjectShi JuSouth-to-North Water Diversion Project28-309Practice of full coverage of internal audit in South-to-North Water Division Middle Route ProjectWang Qiang, Li NingSouth-to-North Water Diversion Project33-3510Considerations of enhancing project safety of PCCP water conveyanceZhao Xiaofang, Zhang Jun, Yuan HaoyanSafety Production and Supervision42-4511Discussion on safety appraisal regulation of long-distance water diversion projectHu Jiang, Ma Fuheng, Sheng Jinbao, Dai Zhanqiang, Li Shuncai, Fu YouqunSafety Production and Supervision46-4812Analysis and countermeasures on performance of soil and water conservation supervision and management in production and construction projects of grassroots organizationsShen Xuejian, Li Zhiguang, Wang HaiyanSoil and Water Conservation51-5413Case studies and experience summary of social capital participating in design of asset operation mechanism for large-scale water projectsWu Zhaodan, Liu Yening, Zhang Wendi, Zou FeiWater Finance and Economy55-57,6114Research on related issues of water right trading in Shule River BasinTang Xiaojuan, Cui Jing, Wang JundeWater Finance and Economy58-6115Practice and effect evaluation of agricultural water price comprehensive reform in Kunshan CityXu Weijian, Liu Guoping, Xu Jianping, Teng ZhaomingWater Finance and Economy62-64 