Bo Huang is from Qingdao. Why does he speak Weihai dialect in movies and TV series?

Bo Huang is from Qingdao. Why did he speak Weihai dialect in movies and TV series? Firstly, it was based on the requirements of the director and the needs of the plot, and secondly, it was related to his own growth experience. Qingdao was an immigrant city in the early 20th century. Especially when 1949 Qingdao was liberated, many people entered Qingdao from Shandong Peninsula. When Bo Huang lived in Qingdao, he would always hear their local accents, so it was easier to imitate them.