TED-Ed: Shunan Teng: The Chinese myth of the white snake and the meddling monk

Xu Xian attends a temple ceremony despite his wife Bai Su Zhen's warnings. Bai Su Zhen, a benevolent snake spirit, confronts the monk Fa Hai, who traps her in an alms bowl. Their son, Shi Lin, is the reincarnation of a wisdom god and eventually frees his mother, reuniting the family.

What did Xu Xian do after Fa Hai trapped Bai Su Zhen in the alms bowl?

How did Shi Lin manage to free his mother, Bai Su Zhen, from the Lei Feng Pagoda?