Which episode of the Song Dynasty Youth Chronicles is the one where Wang Kuan and Zhao Jian withdraw from each other’s birthday posts?

Episode 2. "Youth Chronicles of the Song Dynasty" is set in the Qingli years of the Northern Song Dynasty. It tells the story of six young men who help each other for the sake of their family and country, and fight on the hidden front to protect the country, the country, and the safety of the people. In the second episode of the play, Wang Kuan and Zhao Jian each With ownership, we returned birthday stickers to each other. A birthday card is a card that records a person's birth date and is used by both parents when marrying their children.