Career
Tan Jiajun joined Guangzhou Evergrande"s youth academy after he graduated from his high school. He played for the club"s youth team Guangzhou Youth in the China League Two and scored five goals in 19 appearances in the 2011 season. He was promoted to Guangzhou"s first team by then manager Lee Jang-Soo in 2012.
On 11 May 2012, he made his debut for the club in a 3-1 loss against Dalian Shide, coming on as a substitute for Gao Zhilin.