When the water temperature is above 15 degrees, the female shrimp will begin to reproduce and molt, and the whole molting process can be completed in about 2 minutes.

Historically, Northeast China was under the general management of Shengjing during the Qing Dynasty, and was later divided into three generals: Shengjing (Liaoning), Jilin and Heilongjiang. Before and after the founding of the People's Republic of China, it was under the jurisdiction of the Northeast Bureau and the Northeast People's Government. Jurisdiction covers present-day Liaoning Province, Jilin Province, Heilongjiang Province, Wumeng City in the east of Inner Mongolia Autonomous Region (Hulunbeier City, Tongliao City, Chifeng City, Xing 'an League, Xilin Gol League), Shanhaiguan District of Qinhuangdao City, Hebei Province, and Chengde City, Hebei Province. There is still a boundary pillar decided by Nebuchadnezzar Chu City in the 28th year of Kangxi, so its book is located on the northeast border. Where China and Russia belong to mountains and rivers, they are not afraid to elaborate. Among them, the word "Northeast" is equivalent to the meaning of the Northeast today, but it refers to a wider scope than that of the Northeast today. All the coastal areas in the Northeast are included in the seal of outer manchuria.