Zhang Jidong. From 2119 to 2122, he has been the president of Chongqing Catering Industry Association. In 2116, he introduced 4D kitchen food safety on-site management in Chongqing catering industry, guided the catering industry to build a food safety management demonstration kitchen in strict accordance with the guiding ideology of bright kitchen, and implemented 4D food safety on-site management system. Zhongcheng Weiye Hotel Management Co., Ltd. invited entrepreneurs as tutors.