lit. cut sleeve (idiom); fig. euphemism for homosexuality, originating from History of Western Han 漢書|汉书: emperor Han Aidi (real name Liu Xin) was in bed with his lover Dong Xian, and had to attend a court audience that morning. Not wishing to awaken Dong Xian, who was sleeping with his head resting on the emperor's long robe sleeve, Aidi used a knife to cut off the lower half of his sleeve.
Lizhu, personal name of twenty-first and last Tang emperor Aidi 哀帝[Ai1 di4] (892-908), reigned 904-907
Emperor Aidi of Tang, reign name of twenty-first and last Tang emperor Li Zhu 李祝[Li3 Zhu4] (892-908), reigned 904-907