April 30th. According to the latest announcement of inquiring about Chenggu Jiao Yan Reservoir, the planned completion time of the project is April 30, 2022, the construction period is 203 days, and the designed dredging channel is 8.6 kilometers. After the project is implemented, the risk of flood caused by backwater of Jialing River will be reduced, the flood discharge section of waterway will be expanded, and the flood discharge capacity of urban section will be enhanced.