Chu Suiliang
In 648, Cui was made "Zhongshu Shilang" (), the assistant head of the legislative bureau, not typically considered a post for a chancellor, but Emperor Taizong gave him the additional designation "Canzhi Jiwu" (), making him a "de facto" chancellor. Emperor Taizong was often listening to his advice, and this brought jealousy from fellow chancellor Chu Suiliang. It happened at this time that there was a person who came to the palace door to air his grievances, and Cui did not report this grievance to Emperor Taizong. Emperor Taizong saw this as hiding relevant events from the emperor and exiled him to Gong Prefecture. Later, after a general pardon, he was allowed to return from exile.