On August 16, 1933, the Japanese army established a bacterial force in the northeast. The Japanese army stationed in the northeast of China killed the warriors of the Yihad Army on August 16, 1933, Japan established a bacterial research institute in the east of Harbin City, anonymously called the "Gamou Forces" and "Naru Forces", publicly referred to as the "Ministry of Pest Prevention". In 1928, the Japanese army sent Yihad to visit abroad. After 1930, Yihad was encouraged to conduct a bacterial battle and was supported by the Japanese army. In August 1932, the Japanese Army Medical School established a clinic for Pest Prevention, and Yihad began to conduct bacterial weapons research.