Which episode is Gong Shangjiao slapping Gong Yu in the face?

The fourth episode. According to the introduction of YunYu, a story about strength and emotion is told. In the play, Miyako is still an important role, and his appearance has injected many twists and turns and suspense into the whole plot. In the fourth episode, Gong and Gong had an argument. Gong Shangjue directly slapped his brother and also slapped Gong.