On this day 34 years ago, on June 26, 1991 (May 15, 1991 lunar calendar), the National Defense General ordered the opening of the Taihu Water Lock for flood discharge. At 10:00 am on June 26, 1991, according to the order issued by the National Flood Control Headquarters, the Taihu Water Lock - Taipu Gate, which has been built for more than 30 years, was officially opened for flood discharge in the Taihu Lake Basin. After plum fell in 1991, the Taihu Lake Basin received continuous rainfall, especially from June 11 to 20. The basin fell into heavy rain, with an average rainfall of more than 300 mm. The water level of Taihu Lake rose sharply. By the 23rd, it rose to 4.28 meters, exceeding the warning water level by 0.78 meters, causing more than 5 million mu of farmland to be flooded, many factories were destroyed, and Wuxi, Suzhou and other cities were seriously threatened. Around the end of the month, another rainfall process is forecast in the Taihu Lake Basin, and the water level may continue to rise. In order to ensure flood control safety, the State Flood Control Headquarters negotiated with Jiangsu, Zhejiang and Shanghai municipalities and reported the approval of Tian Jiyun, the Premier of the State Council and the commander-in-chief of the State Flood Control Headquarters, and issued an order to open the Taipu Gate for flood discharge. After this gate is opened, part of the flood water in Taihu Lake can flow along the Taipu River through the Huangpu River and be discharged into the East China Sea. Shanghai, which is located in the lower reaches of the basin, resolutely obeyed the overall situation and made emergency arrangements to face the upstream flood. The State Flood Control Headquarters requires the region where the Taihu Lake Basin is located to carry forward the spirit of unity and water control, strengthen cooperation and cooperate closely to win the overall victory in the flood control struggle.