In 3rd Battalion, Tong Tong is the daughter of Cheng Bing. She worshipped her father since she was a child, but when she grew up, she alienated her father because of misunderstanding.

In the play, Tong Tong is played by the new actor Zhou Zixuan. As for the ending of Tong Tong, there is no clear explanation in the play. But what you can know is that Cheng Bing finally reconciled with his girls and children, and Tong Tong also gave up the misunderstanding in the past and reunited with his father.