Dai practices martial arts because his family wants him to stay healthy and not be bullied by others. When Dai was born, people lived a hard life, so they practiced martial arts to prevent being bullied. Dai (1879-1979) has the reputation of "Rehe Zexu", and he is upright and unyielding. He is the hero of the TV series Dog Stick and the leader of the Jehol War of Resistance.