杜如晦
With particular advocacy from Yuchi and Zhangsun Wuji, Li Shimin decided to take action. Li Shimin tried to summon his strategists Fang Xuanling and Du Ruhui, who had been demoted out of his mansion based on accusations by Li Jiancheng and Li Yuanji, and when Fang and Du initially resisted (as they feared Emperor Gaozu's wrath), Li Shimin sent Yuchi to summon them, with the direction that if they refused, that they be killed. Yuchi was able to persuade Fang and Du that Li Shimin was about to take action and that they should not fear, and then divided up with Fang and Du, arriving at Li Shimin's mansion separately.