On this day, 87 years ago, on June 9, 1938 (May 12, 1938, the lunar calendar), Chiang Kai-shek ordered the Japanese army to reach Huayuankou and drown 890,000 people. On June 9, 1938, Jiang Zaizhen, commander of the Kuomintang's new Eighth Division, proposed to break the embankment at Huayuankou and was accepted and received a reward of 2000 yuan. Before digging the embankment, Jiang Zaizhen first drove all the people in Huayuankou area to 10 miles away, and then densely packed the sentry posts. More than 800 able-bodied soldiers were selected and divided into 5 teams. They took turns digging the embankment day and night, and used car lights at night. At about 9 a.m. on June 9, Jiang Zaizhen's troops successfully broke the embankment at Huayuankou. The river rushed out, and the water flowed from Zhongmou and Weishi along the south of Shandong. Afraid that the breach would be too small, they urgently called Xue to dispatch two flat-firing cannons and a platoon of soldiers. Under the leadership of a company commander, they fired sixty to seventy shells in a row, expanding the breach to 370 meters and diverting the entire river. The four surging villages of Shaoqiao, Shijiadi, Wangjiadi and Nanya were suddenly washed away by the flood and disappeared. Outside the mouth, it is washed into a deep pool 13 meters deep and more than 2500 acres in diameter. Floods rolled southeast along the Jialu River, Ying River, Wo River and other rivers, expanding from more than ten miles to more than 100 miles wide, rampage across the densely populated Great Plain, and then poured into the Huaihe River from Zhengyangguan to Huaiyuan. After the yellow water entered the Huaihe River, it overflowed both sides of the river and continued to flood. Statistics from the General Administration of Rehabilitation and Relief of the Executive Yuan: 44 counties and cities in Henan, Anhui and Jiangsu provinces were affected by the disaster. 3911354 people fled, 893303 people died, and economic losses were 1.09176 billion yuan.