Ding Xiaowei's daughter is mute?

Yes Ding Xiaowei is the protagonist who is closest to ordinary people in 188 series. A truck driver in his thirties, divorced, his ex-wife followed a rich man and a dumb daughter. Even school grass, with such conditions in real life, has a hard time. He used up all his strength just to survive, and there was a lot of ridicule and cold eyes around him.