What's the story of the Beijing Opera "Second Palace"?

After the death of Ming Taizu Mu Zong, the prince was young and Li Yanfei listened to politics. His father tried to usurp the throne, appointed King Xu Zhao Yan and Bai Yang, assistant minister of the Ministry of War, and dissuaded him from speaking in Longfeng Pavilion. Li Fei was stubborn and refused to listen to opinions, and the ministers argued fiercely and broke up in discord. Li Liang blocked Zhaoyang Courtyard, isolated from the inside and outside, with obvious traces of usurpation. After discovering Huangling, Xu and Yang went into the palace to remonstrate. At this time, Li Fei had repented and continued to delay state affairs. After Bai Yang sent his troops, he killed Li Liang.