Ji Kang, courtesy name Shuye, was a man of the Western Jin Dynasty. He once served as a court advisor, earning the title "Ji the Advisor." A man of vast learning and talent, he was renowned across the land. As a son-in-law of the Cao Wei royal family, after the Sima clan usurped power, he refused to curry favor with the new regime, often displaying a defiant and aloof demeanor.
A prominent young noble named Zhong Hui, a trusted aide to General Sima Zhao, had heard of the famed scholar Ji Kang and decided to pay him a visit at his home.
When Zhong Hui visited, he "rode a fat horse, wore light furs, and had a cloud of attendants." At that time, Ji Kang was sitting with his legs stretched out, forging iron. He paid no attention to this nobleman and continued his own work. Zhong Hui left in great anger.
From that moment on, Zhong Hui held a deep grudge over the incident. Eventually, he found a pretext to falsely accuse Ji Kang, and Ji Kang was unjustly executed.
The idiom "Riding Fat Horses, Wearing Light Furs" means riding plump horses and wearing soft fur coats, later used to describe a luxurious lifestyle.
Source: *Records of the Three Kingdoms*, "Book of Wei: Biography of Wang Can"
Meaning of the Idiom: Later, the Chinese idiom "乘肥衣轻" came to describe a luxurious lifestyle.