It’s called Baoan Tang.
Bai Suzhen gave Xu Xian the treasury silver stolen by Xiaoqing to help him open a drug store to make a living independently. Xu Xian was involved in the theft of treasury silver. Xiaoqing used magic to force the magistrate to give a lighter sentence, and Xu Xian was sentenced to be sent to Suzhou. Bai Suzhen and Xiaoqing came all the way and finally met Xu Xian in Suzhou. Suzhen lied and deceived Xu Xian into stealing money from the treasury, so the couple opened a medicine shop and a security hall in Suzhou to help the world.
During the Dragon Boat Festival, Xu Xian was frightened to death because Bai Suzhen revealed her true form after drinking realgar wine. Suzhen was eager to save her husband and rushed to Yaochi to get the elixir. However, she couldn't get the elixir, so she had to snatch it. The Queen Mother was furious and wanted to execute Bai Suzhen. Master Xin Guanyin came to the rescue and saved the couple. Finally, Bai Suzhen took the Ganoderma lucidum grass obtained from the Antarctic Immortal Cave and was brought back to life.
Extended information:
It is said that the story of Xu Xian and White Snake originated in the Northern Song Dynasty and took place in Xujiagou Village at the foot of Jinshan Mountain in Hebi City. Back then, the White Snake Spirit was rescued from the mouth of a black hawk by an old man named Xu in Xujiagou. The White Snake Spirit was very grateful to the old man named Xu for saving her life. When the White Snake Spirit cultivated into a human form, she went to Xujiagou to find her savior.
At this time, the old man surnamed Xu who rescued White Snake Jing was no longer alive. When Bai Snake Jing learned that Xu Xian was the descendant of the old man surnamed Xu, he married Xu Xian as his wife.
After Xu Xian and Bai Niangzi got married, because Bai Niangzi was proficient in pharmacology, she often collected herbs in the mountains to treat diseases of the local people. Many people know that Bai Niangzi has superb medical treatment skills, and they go to Bai Niangzi and Xu Xian's home one after another.
This behavior of White Snake angered Fahai, the elder of Jinshan Temple. It is worth mentioning that Fahai was the reincarnation of Black Eagle. In order to take revenge on Bai Niangzi, he decided to destroy the marriage between Bai Niangzi and Xu Xian.
In order to save Xu Xian, White Snake staged storylines such as "Stealing Immortal Grass" and "Water Flooding Jinshan Temple". When the White Snake fell in love with the Jinshan Temple, she gave birth to a son, Xu Shilin, due to fetal motility. Fa Hai saw that White Snake was weak, so he took the golden bowl to take White Snake in and suppressed her under the Lei Feng Tower.
After White Snake was suppressed, Xu Xian was disheartened. He decided to become a monk at Jinshan Temple and take care of his son Xu Shilin. Eighteen years later, Xu Shilin won the top prize in high school. His filial piety moved heaven and earth, so White Snake was released and the whole family was finally reunited.
Baidu Encyclopedia-Xu Xian