Chongqing University. Rainbow Couple's husband's name is Guo Bin and his wife's name is Sun Caihong. Both of them are post-90s short video bloggers on Tik Tok platform. Rainbow is three years older than her husband. Both of them graduated from Chongqing University. Chongqing University, referred to as Chongda for short, is a national key university directly under the Ministry of Education of People's Republic of China (PRC), co-founded by the Ministry of Education, Chongqing Municipality and the State Bureau of Science, Technology and Industry for National Defense.