Jia Dai, formerly known as Ren Jiazhong, 1963, is from Beijing. Due to the influence of family environment, Jia Dai joined the army when he grew up. After several years of hard training, he learned a skill. After leaving the army, he became a clerk. In fact, according to his intelligence, if he continues on this road, he may not achieve something. However, Jia Dai was not satisfied with his nine-to-five life, so he resolutely resigned from his iron rice bowl and started his own career.

Jia Dai's eldest brother finally died in May of twenty years.