In which episode did the emperor tell Ji Xiaolan about the emperor's art?

Episode 6. Ji Xiaolan is a man with iron teeth and copper teeth in Ji Xiaolan, and Ji Xiaolan with iron teeth and copper teeth is a costume drama series directed by Liu Jiacheng, Zhang Guoli and Luo Changan. The sixth episode is a light comedy about history. The drama mainly tells the story of the struggle between Ji Xiaolan and He Shen during the Qianlong period and their participation in solving crimes.