Sun Weizhe started his professional football career in 2015 when he was promoted to Chinese Super League club Guizhou Renhe's first team squad.
[1] He made his senior debut on 7 July 2015 in a 3–2 away win over second-tier club Jiangxi Liansheng in the 2015 Chinese FA Cup.
On 26 February 2017, he made his debut for the club in a 1–1 away draw against Lierse, coming on as a substitute for Saviour Godwin in the 89th minute.
He made his league debut for Renhe on 28 October 2017, playing the whole match in a 2–1 home win against Hangzhou Greentown.
[4] Sun made his Super League debut on 3 March 2018 in a 1–0 away loss against Chongqing Dangdai Lifan, coming on for Luo Xin in the 73rd minute.