Why didn't Chiang Kai-shek kill Yu Youren?

Chiang Kai-shek did not kill Yu Youren for the following reasons. The influence is not good, and if you kill Yu Youren's family, the influence is even worse.

1. Yu Youren himself is not afraid of death, and he is courageous and resourceful. As a veteran of the Kuomintang, You Ren is known as Mr. A pen, which is better than a hundred thousand muskets. Even Chairman Mao respects him very much. And after arriving in Taiwan Province, it became his farewell to his relatives.