As the princes further grew, several things further led to an endearment between Emperor Yuan and Prince Kang. They shared affection and skills in music—particularly in the playing of drums. Prince Kang also showed high intelligence and diligence, while Crown Prince Ao was known for drinking and womanizing. When Emperor Yuan grew ill circa 35 BC—an illness that he would not recover from—Consort Fu and Prince Kang were often summoned to his sickbed to attend to him, while Empress Wang and Crown Prince Ao rarely were. In his illness, apparently encouraged by Consort Fu, Emperor Yuan reconsidered whether he should make Prince Kang his heir instead. Only the intercession of Shi Dan led Emperor Yuan to cease those thoughts. When Emperor Yuan died in 33 BC, Crown Prince Ao ascended the throne (as Emperor Cheng).