 He would immediately establish himself as their first choice goalkeeper when he made his debut in the first game of the season on May 16, 2004 against Beijing Hyundai in a 1-1 draw.While he was an integral part of the team that finished ninth within the league Sun Shoubo would only stay with Sichuan Guancheng for one season after Dalian Shide showed an interest in him.With the chance to return home to Dalian, Sun Shoubo would transfer to Dalian Shide in the 2005 Chinese Super League season to play as an understudy to Chen Dong.