What's the line of that movie? Chicken, you are the youngest one in mahjong.

The movie you are talking about is called Passing Through Your World, which is the line that Chen said in the second half of the movie:

You always say that you are not beautiful enough, not brave enough and have such shortcomings. Yes, you are telling the truth, but so what? Because you are a chicken, the smallest one in mahjong, but without you, thirteen orphans can't be fooled.