Ming Sheng Rui and back door control. According to the relevant public information on the website, Ming Sheng Rui and Backdoor Dakong are located at No.006, Industrial Concentration Zone, Jiangyong County, Yongzhou City, Hunan Province, and the company officially changed its name in the national share transfer system for small and medium-sized enterprises. Before the change, the company name was Dalian Dafu Holding Co., Ltd., after the change, the company name was Hunan Mingrui Shenghe Holding Co., Ltd., before the change, the company's securities were abbreviated as Dakong 3, and the securities code remained unchanged after the change.