Who is Cheng Shaoshang's brother?

Yong Cheng, Cheng Song and Cheng Shaogong.

Cheng Shaoshang, a splendid star, has three brothers, namely, Cheng Shaogong. These three brothers and Cheng Shaoshang are the same father and mother, and they are both young sons. Cheng Shaoshang's eldest brother didn't appear much in the play. He studied in Bailushan, was very talented and served in the army. Cheng Shaoshang's other two brothers, Cheng Song and Cheng Shaogong, are very kind to Cheng Shaoshang.