Ke Yulun plays the prototype of mustard tuber, and he is also his brother who fought with A Xin in reality. This originally annoying role earned Ke Yulun the nomination for best supporting actor in the 48th Golden Horse Awards.

Ke Yulun plays the fruit stall buddy of A Xin's family, La Cai, who is a later brother of credit. Love to show off, usually relying on A Xin to show off in the streets.