The third prince tells the imperial study room that he has temporarily locked Mr. Liu in his mansion because he is a spy for the third prince. The prince says that he is curious about the man because he can earn the prince's respect. He says that the suspect who was brought back by yuehai was Mr. Liu, who was detained by the zhengzhenge department but allowed to stay in the imperial mansion. He tells the prince that rong su did not betray him, and that the emperor does not want him dead. He asks the prince why he invited him to the palace, and the prince replies that he did not want to interfere in the princess's case. He adds that the next day the prince has sent someone to invite the prince to his palace.