What is the plot of the finale of Snail House?

Haizao betrayed Xiaobei, but was discovered by Mrs. Song. She kicked Haizao, and Haizao's child fell off, making her sterile. Song rushed to the hospital to see the seaweed. On the way, he found that he was being followed, so he drove very fast, hit a truck, and died.

Haizao couldn't accept this fact, so he didn't speak for three months. Later, Mark took Haizao to the United States, because Song had asked Mark to take Haizao and the child to the United States.

At the airport, Haizao gave Haiping the 5 million bankbook and asked Haiping to help her pay back the money. Haiping returned the money to the government, and finally Haiping opened a Haiping Chinese school with Mark's help.

Extended information:

This film is adapted from the novel "Snail House" of the same name by female writer Liuliu. ?Su Chun and Guo Haiping (played by Hai Qing) have a close relationship, but they have difficulty buying a house in Jiangzhou due to lack of money, so they have to live in an alley temporarily.

Haiping tried her best to change her predicament, but due to the pressure of housing prices, even if she gave birth to a daughter, she had to be sent back to her hometown to be raised by her parents. After graduating from college, Haiping's sister Haizao (played by Li Nian) fell in love with company employee Xiaobei (played by Wen Zhang). The two also experienced the hardships of saving money to buy a house.

Due to their work relationship, Haizao met the mayor’s secretary Song Siming (played by Zhang Jiayi), who fell in love with her at first sight and helped Haizao and her sister get out of trouble many times. In order to repay the favor, Hai Zao had an affair with him, which got out of hand.

During this period, Haiping repeatedly persuaded Haizao not to live up to Xiaobei's infatuation. However, in order to help her sister realize her wish, Haiping still committed herself to Song Siming and became his mistress.

Later, after the Dongchuang incident, Song Siming's wife (played by Wu Junmei) came to demonstrate against Haizao and was so aggressive that Haizao felt humiliated.

That night, Song Siming came to comfort Haizao, but Xiaobei caught the two of them being intimate...