62 years old. According to Phoenix News, Wang Guoyu is 62 years old. Wang Guoyu, born in 196 1, is the founder of Nanchengxiang, one of the top ten fast food brands in China. Beijing Nanchengxiang Catering Co., Ltd. was established in 1998. For 23 years, it has been focusing on providing catering services to meet the needs of the community. At present, there are more than 100 direct stores in Beijing.