Why did Emperor Wendi pay attention to Zhang Taiyan before he died?

In his later years, Emperor Wendi of Sui Dynasty listened to the slanderers of villains and abolished Yang Yongli and Yang Guang. In addition, his character became suspicious and he killed many ministers. One summer, he was depressed and the weather was very hot. He wanted to leave the palace for Renshou Palace, perhaps for fun, but Zhang Taiwei hurriedly came to persuade Emperor Wendi that something would happen to him during his trip. Unexpectedly, Emperor Wendi didn't believe what he said at all, and said that if he could return safely, he would definitely kill him. Zhang Taiwei was not afraid of death at all. He finally said, I'm afraid you won't come back, your Majesty. Later, Emperor Wendi of Sui Dynasty did not believe in this evil, so he went to Renshou Palace. Unexpectedly, he became ill after living there for a few days, and he was very ill. He remembered what Zhang Taiyan had said, and felt that he was an artist. Let Yang Guang treat Zhang Taiyan well before he died.

When he became emperor, Yang Guang paid more attention to Zhang Taiwei, who lived up to expectations. He also used up what he had learned all his life and did many things for Yang Guang. He figured out these things that Yang Xuangan wanted to rebel. Unfortunately, he was older at that time, otherwise he could have done a lot for Yang Guang, and the Sui Dynasty would not have perished so soon.

Zhangqiu Taiyi has been a schoolmaster since he was a child. He devoted himself to professional knowledge and reading books, especially metaphysics. Moreover, many things he said have come true, so he was famous at that time, and many people came here and were willing to worship him as a teacher. But people like him tend to be lofty and don't like being bound by private customs, so they went to Wutai Mountain and practiced behind closed doors.

Later, Yong Yang knew there was such a person, but called him out and made him the chief of staff of the Prince's Mansion. Zhang Taiyan really didn't respect his master at first, thinking that he wouldn't have the last laugh. Unexpectedly, it was finally abolished, and Zhang Taiyan was left by Emperor Wendi of Sui Dynasty.