What is the main content of the Vietnamese opera Liang Shanbo and Zhu Yingtai?

The main content of the Vietnamese opera Liang Shanbo and Zhu Yingtai is:

Ju Yingtai, a woman disguised as a man, went to Hangzhou to study, and met Liang Shanbo, who became a brother, and they were in the same class for three years, and had a deep friendship. Zhu's father urged his daughter to return home, before Yingtai's departure, she revealed her true feelings to her teacher's mother, entrusted the matchmaker to marry Shanbo, and at the farewell, pretended to be a matchmaker for her sister, and urged Shanbo to go to marry her early. Shan Bo rushes to Zhu's house, not realizing that Zhu's father has already betrothed Yingtai to Ma Wencai, the son of Ma Taishou, and the two of them talk to each other on the terrace, seeing that there is no hope for their marriage, they are overwhelmed with grief. Shan Bo returned home sick and died, Yingtai heard the news, vowed to martyrdom, the day of the Ma family to marry, Yingtai sedan chair detour to Shan Bo's grave to pay homage to the sudden wind and thunder, the grave burst, Yingtai jumped into the Liang Shan Bo and Zhu Yingtai turned into butterflies, and both fluttering.

Reference link:

Liang Shanbo and Zhu Yingtai (2002 Yueju TV series)_Baidu Encyclopedia

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