What is the main story of Dr. Yu?

The main deeds of Dr. Yu are as follows:

Dr. Yu is a scholar in his fifties. He is very loyal. He did a series of good deeds and was entrusted by his friends. After arriving in imperial academy, he fulfilled his promise and gave martial arts books to take care of. Chu Xin and Yu suggested that Dr. Yu hold his birthday in spring to collect some gifts for the spring outing, but they refused.

Dr. Yu's old neighbor, Mr. Tang Xianggong, came to see him and told him that he had sold the house that Dr. Yu asked him to live in because of lack of money. Dr. Yu was not angry, but also gave him another sum of money to rent a house and sent a Guo-zi-Jian diploma who committed gambling to Yingtianfu. Dr. Yu didn't cure his crime, but ate and lived with him and went home a few days later.

Dr. Yu's tragic experience

Dr. Yu's grandfather is an old scholar who teaches, and his father is a teacher who has never been to school. He was born in middle age.

Dr. Yu was a bad baby: he lost his mother at the age of three, went to school at the age of six, died at the age of fourteen and was entrusted to. So I asked Dr. Yu to teach at home and be the husband of his nine-year-old son. At the age of seventeen or eighteen, Qi Taigong advised him not to study poetry alone, but to learn two kinds of eating skills, and taught him everything he knew, such as geography, fortune telling and choice.

I also advised him to buy two papers to read and prepare for the exam and study. At the age of twenty-four, he entered school and became a scholar, so the Yang family spent thirty taels of silver every year to help him teach. Two years later, I helped the doctor get married.