Murong Qin received a reply from the Tian Dynasty, arranged everything in Yan Country, and completely exterminated those who were stirring up trouble. The Emperor's health was declining day by day. The imperial physician said that with the help of the Thousand-year Ginseng, he could hold on for another two months. Murong Qin figured it out; he couldn't become the Emperor and then go over seas as the Emperor. It was easier to negotiate in his current identity as the Prince. If anything went wrong, he could blame it on the Emperor.
As for his own safety, the Emperor of the Tian Dynasty should be more fearful of something happening to him in the Tian Dynasty. If anything happened, Yan Country and the Tian Dynasty would be ruined together, which was exactly what Qi Country and Wu Country wanted to see. Even if Qi and Wu Countries wanted to assassinate him, he had his own hidden guards, and the Emperor of the Tian Dynasty would also protect him. There would not be a huge safety issue.