What episode is the Jiang Lai disco dance?

The fourth episode. According to the plot query of the fourth episode of Good Sir, Lu Yuan was sitting on the rooftop of the bar, watching the night scene of Shanghai. He turned around and saw Jiang Lai who wanted to commit suicide. Just as Jiang Lai was about to fall, Lu Yuan saved Jiang Lai. To celebrate this fate, Jiang Lai invited Lu Yuan to drink again. Jiang Lai drank too much, so he invited Lu Yuan to dance. "Good Sir" is a China urban love drama that premiered on 20 16. The film is directed by Zhang Xiaobo, written by Li Xiao, Zhang Yingji and Yu Miao, and starring Sun Honglei, Jiang Shuying, David Wang, Che Xiao, Lei and Guan Xiaotong. This is the first TV series with the theme of city in Chinese mainland.