Which episode is Wei Wuxian's childhood in the animation of the founder of Magic Road?

The 20th episode of the animation "The Master of Magic Way" tells the childhood of Wei Wuxian and Jiang Cheng.

The plot is similar to the drama version.

Jiang Cheng kicked Wei Wuxian out and said that he would let the dog bite him. He ran to the tree. The teacher elder sister went out to look for him, and Jiang Cheng also went out to look for him. The last three people went home together. Memories of three people as children.