About Mulan II
A month after the events of the first film, General Shang asks Mulan for her hand in marriage, which she accepts. Hearing about their engagement, Mushu is thrilled for them- until the leader of the ancestors informs him that if Mulan gets married, he will lose his job as a guardian dragon and have to leave her and his pedestal, his place of honor as a guardian. The reason for this is because Mulan would be getting married to Shang, thus she becomes a part of his family which requires her to have his family ancestors and guardians.
Wanting to keep his job and his friend, Mushu attempts to tear the couple apart (especially for selfish reasons, but, officially, because he sees that they are not very compatible). Meanwhile, the Emperor calls upon Mulan and General Shang to escort his three daughters- Princesses Mei, Ting-Ting, and Su across China to be betrothed to three princes so that an alliance can be formed with the kingdom of Qui Gong. If the task is not completed within three days, the alliance will crumble, and the Mongols will destroy China.