In The Qianlong Reign的意思|示意

干隆朝 In the Qianlong reign, the construction of Qiantang river seawall project marked the transition from "repair by people" to "repair by government". In order to realize this objective "once and for all," the Qing government did not spare any expense to construct the fish-scale stone seawall. By the late Qianlong reign, the seawall project system was basically complete.