On July 2, Shanghai Shenhua defeated Tianjin Jinmen Tigers 1-2 in the 14th round of the Chinese Super League. Dai Weijun made his Shanghai Shenhua debut as a substitute in the first half. After the game, he posted a photo of the game on social media with the caption, "After a long wait from last October to now, I'm finally back on the familiar green field, and this is the first home and away game that I've really participated in. The fans brought me unprecedented enthusiasm! Although today's ending was a bit unfortunate, we should not bow our heads and move forward even harder!"
On October 29, 2022, Dai Weijun was injured in a match against Shenzhen, which was eventually won 2-0 by Henan. This season, Dai Weijun failed to represent Shenzhen due to differences with the team, and on June 28, he was transferred to Shanghai Shenhua.
