When did Emperor Jinxiu Weiyang know who Weiyang was?

On the way to Weiyang, I accidentally bumped into the house being painted and printed handprints on the wall. Mingde has enlarged the handprint. The emperor believed Weiyang's explanation and asked if Weiyang was the princess of Guo Liang. It turns out that Chang Ru has told the real identity of the Emperor Weiyang through Zhao Yi. Weiyang admitted that she was Princess Xin 'er, and told the emperor what she had done in scolding Yunnan, and the throne was also presented to the Holy Family by Tuobajun. The emperor was shocked that Yunnan was going to rebel, but because Yunnan had been rewarded, the emperor agreed to abolish the cold slave system, but did not deal with Yunnan. On his way to office, Youzhou was stopped by lord protector. On his way to office, he met a masked man sent by the emperor to assassinate him. He was injured in Yunnan and fled to the river. He was stabbed in the abdomen by a peach posing as a ferryman, and both of them fell into the water. The bodyguard reported to the emperor that Yunnan had been killed by Weiyang's handmaid Tao Jun, and Tao Jun had also died. In the name of Weiyang conniving his men to kill the Lord protector, the emperor sentenced Weiyang to be beheaded three days later. Mingde went to the Prince's Mansion to beg TaBaJun to intercede for Weiyang.