Who is the third son in Pu Opera Lu Hua?

The "third son" in Pu Opera refers to the third son of Min's father.

Content: One day in the middle of winter, heavy snow fell and the north wind roared. Zi Qian is a guest whose father is away on business. Zi Qian's cotton-padded coat is thick but shrinking and afraid of cold, while his younger brother Ying Ge is thin and not afraid of cold. His father was very angry and whipped Zi Qian until his clothes were worn out. Lu Hua fluttered in his cotton-padded jacket. When Min's father saw it, he regretted it and cried with his son in his arms. When he got home,

The whole story of Pu Opera Lu Hua: According to legend, Min Min (Zi Qian), a disciple of Confucius, lost his mother when he was young. Stepmother Li favors her own son and mistreats him.