1. Boya broke the piano: Boya, an ancient musician, whose bosom friend was Zhong Ziqi. Boya plays the piano, and Zhong Ziqi can feel the emotion and artistic conception in his music. On one occasion, Boya played "Mountains and Rivers", and Zhong Ziqi said, "It's good to play the drum piano! Soup is like running water. " Boya was very happy because Zhong Ziqi really understood his music. However, after Zhong Ziqi's death, Boya could never find such a bosom friend, so he broke his favorite piano and never played it again.

2. Zhuge Liang and Zhou Yu: During the Three Kingdoms period, Zhuge Liang and Zhou Yu were both very smart people. They once joined forces against Cao Cao in the Battle of Red Cliffs. Zhou Yu appreciates Zhuge Liang's ingenuity very much. They often discuss strategies and tactics together and become bosom friends. However, Zhou Yu later became ill because of jealousy of Zhuge Liang's talent, and finally died.

3. Lu Xun and Hu Shi: Lu Xun and Hu Shi are important figures in modern literature in China. They used to be good friends and often discussed literary and social issues together. They have a deep friendship, respect each other, learn from each other and become bosom friends. But later, because of different views, there were differences, and finally the relationship was alienated.

4. Zhang Xueliang and Yang Hucheng: Zhang Xueliang and Yang Hucheng are important figures in the modern history of China. They joined forces to force Chiang Kai-shek to stop the civil war and unite with the outside world in the Xi 'an incident. Their friendship is profound, they support and trust each other, and they have become bosom friends. However, Zhang Xueliang was later placed under house arrest by Chiang Kai-shek, and their relationship also changed.