Li Chengqian
It was said that Li Chengqian favored music, women, and hunting, and was wasteful in pursuing these things, but at the same time maintained a veneer of virtue to the outside world. Among his guards, he often took on Tujue customs, wearing Tujue clothes and spoke Tujue, often engaging in Tujue-style camping. Meanwhile, several other acts of Li Chengqian were also drawing Emperor Taizong's ire. Homosexuality. Li Chengqian had favored a young man that he nicknamed Chengxin (稱心, meaning, "satisfying my heart"), probably in a sexual relationship. He had also favored Taoist monks Qin Ying (秦英) and Wei Lingfu (韋靈符), and he had them use magic—acts that were considered extremely disapproved among imperial subjects. When Emperor Taizong found out about these things, he put Chengxin and the Taoist monks all to death. Li Chengqian, believing that it was Li Tai who informed Emperor Taizong, became increasingly angry with Li Tai, and he, in sadness over Chengxin's death, also refused to attend imperial gatherings for months, while establishing a shrine for Chengxin within his palace.