Cai Yin is the uncle of Liu Yazi and was born in the Cai family in Lili, and is the second secretary of Sun Yat-sen from Lili. Cai Yin was eager to learn from childhood, and he was able to write large characters when he was a child. He has the reputation of prodigy. He is outstanding in his poetry, and he has a lot of research in poetry and painting. When Liu Yazi was the leader of Nanshe, he was promoted to be a giant peoson.
