After the Emperor confined King Liang, Li Mingrui once met with the Emperor. He mentioned his familiarity with King Liang and the relief efforts at Yanwo, hoping to send some people to take care of King Liang. The Emperor thought Li Mingrui was mindful of his old friendship with King Liang and thus told the Hidden Guard to turn a blind eye while also advising the Crown Prince not to interfere.
Inside the mansion of King Liang, Li Mingrui claimed he feared that King Liang, in possession of Left Prime Minister Li Mao's letters with his second royal brother, might drag someone down with him if he were to die. Thus, he added extra care, sending people to monitor him.
Because Li Mingrui frequently sent people to secretly deliver supplies and serve King Liang, the mansion was filled with Li Mingrui's men. When the Hidden Guard saw the door to the side gate opening to let Wang Qiulu in, they didn't think much of it, assuming it was Li Mingrui's people delivering something to King Liang.
