According to the sky eye inspection, on December 20, Zhan Ketuan stepped down as executive director, general manager and legal person of Fujian Zhizhi Technology Co., Ltd. Fujian Zhizhi Technology Co., Ltd. was established in March 2018 and has been invested by Bitmain. Wu Jihan has been the company's supervisor, and Zhan Ketuan has been the company's legal person. Both are currently exiting the company. However, the Zhanke Tuan has not completely disconnected from Fujian Zhizhi Technology Co., Ltd. At present, the company's second largest shareholder is Fujian Zhanhua Intelligent Technology Co., Ltd., which is wholly-owned by Bitmain. At the same time, Wu Jihan was a supervisor of the company. According to statistics, Zhanke Tuan has stepped down as the legal person / senior position of a number of companies since recent times, including Shufeng Technology (Beijing) Co., Ltd. (retired legal person, executive director, manager), Tianjin Diwei Digital Technology Co., Ltd Company (legal person, manager, executive director, main member), Beijing Bit Continental Technology Co., Ltd. (retired legal person, principal member, executive director, manager), Beijing Bit Continental Technology Co., Ltd. Wuyuan County Branch (person in charge), etc.