72 which episode is the guest's mandarin?

In the third season, episode 14, director Niu instructed everyone in the whole situation to speak Mandarin, that is, Mandarin. Director Niu knew that Douban knew Mandarin and asked him to teach other policemen.

Seventy-two tenants mainly tells many interesting, funny and thought-provoking stories that happened in a three-story quadrangle in Xiguan, Guangzhou 40 years before liberation. At that time, the soldier king, eight aunts and more than 70 tenants were intertwined.