Chiang Kai-shek's introduction in Qingdao: Chiang Kai-shek lived in Yiju Villa, which was a secret at the time. During those days, the Badaguan Scenic Area was under strict security, and confidentiality and security work were meticulous. In order to keep confidentiality both rigorous and natural, Wang Zhichao, the director of the Qingdao Police Department at the time, decided to "disguise". He set up large watermelon stalls and cold drink stalls at important traffic intersections at the time, and would conduct inspections once anyone entered. It was not until after Chiang Kai-shek left that people knew that he had lived at No. 36 Zhengyangguan Road.