What is the writing background on the back?

The writing background on the back is as follows:

In the years before Zhu Ziqing wrote, the relationship between Zhu Ziqing and his father was very contradictory and even hostile. When Zhu Ziqing graduated from Peking University at the age of 22 and returned to his alma mater Yangzhou No.8 Middle School to teach, he had a fierce conflict with his father. Hongjun Zhu, the father of Xuzhou Tobacco Marketing Bureau, was unemployed at home at the age of 48. He thought it was natural for Laozi to get his son's salary, so he directly took his son Zhu Ziqing's salary that month without consulting his son, based on his personal relationship with the headmaster of Yangzhou No.8 Middle School.

This move by his father made his son Zhu Ziqing, who was influenced by new ideas, very dissatisfied and left angrily. Later, Zhu Ziqing also took his wife and children to settle in Hangzhou. Father Hongjun Zhu was obviously angry with his son's arrangement. The communication between father and son was interrupted, and the relationship between father and son fell to freezing point during this period.

Until 1925, after Zhu Ziqing transferred to teach at Peking University, he accidentally received a letter from his father, which said, "I am in good health, but my arm hurts badly, so it is inconvenient to carry a pen, and the time to go to Peking University is not far away." This kind of words actually means that his father is mainly. Zhu Ziqing remembered that eight years ago, when he came home, his father sent him to school and bought him oranges, and he got this "Back".

Brief introduction of the author

Zhu Ziqing (1898~ 1948), formerly known as Huazi, was named Qiushi. People from Yangzhou, Jiangsu. Early member of "Literature Research Association", famous modern essayist and scholar. Professor Tsinghua University was transferred to The National SouthWest Associated University to teach after the outbreak of War of Resistance against Japanese Aggression. Under the influence of the anti-Japanese democratic movement, the political attitude is obviously inclined to progress.