At the beginning of the 2004 league season he would join reigning Chinese FA Cup holders Beijing Guoan where he immediately became a regular within the team.

He continued to play a vital part within the team until Huang Bowen would start to rise to prominence and replace him during the 2007 league season.

As part of the promising young Chinese players that were studying abroad the Chinese Head coach Qi Wusheng would include Sui Dongliang into his squad to make his debut in a friendly against USA on January 29, 1997, in a game that China won 2–1.

[2] He would go on to play for the Chinese U-20 that took part in the 1997 FIFA World Youth Championship and once the tournament finished he was one of several players that would graduate from the Chinese Jianlibao Youth Football Team to the senior team along with Li Jinyu, Li Tie and Zhang Xiaorui.

On 12 August 2022, Sui was appointed as caretaker manager of Beijing Guoan after Xie Feng had resigned.