Who is the big Yin in historical records?

The Yin people in Historical Records refer to Lao Ai, who is said to have huge genitals and strong sexual ability. He entered the palace as false eunuch and committed adultery with Qin Shihuang's biological mother, Evonne. Finally rebelled and was killed.

According to Records of the Historian and Biography of Lv Buwei, Lao Ai is a "big Yin man" (a man with a huge penis), who can "walk in the wheel of Yin Guan Tong" (turning the wheel of paulownia around the penis).

Seeing Ying Zheng, the king of Qin, growing up, he was afraid that he would get into trouble if he continued to commit adultery with Empress Dowager Qin and Zhao, but he had to satisfy his lust. So after hearing that Lao Ai had power, he brought Lao Ai into the government and asked him to perform the art of turning over his penis from time to time.

Evonne was overjoyed to hear that her sexual ability was so strong. She conspired with Lv Buwei to make Lao Ai suffer from corruption (castration), cut her eyebrows and remove her beard, and successfully entered the Queen Mother as a eunuch. Later, in order to facilitate camouflage, Evonne and Lao Ai moved to Yongcheng, the capital of Qin State, and they gave birth to two sons. Lao Ai calls himself a "fake father".

In 239 BC, Lao Ai was named Chang Xin Hou, with Shanyang County (now southeast of Jiaozuo, Henan Province) as the food city and Hexi, Taiyuan and other counties as farmland. At most, Lao Ai had thousands of servants and more than a thousand visitors.

In 238 BC, someone tipped off Ying Zheng that Lao Ai was a fake official, had an affair with the Queen Mother Evonne, and even wanted his son to reign. Ying Zheng ordered a thorough investigation. Determined to put all his eggs in one basket and strike first, Lao Ai forged the seal of the King of Qin and the Empress Dowager, led his servants and a few deceived troops to launch a coup, and captured the Qinnian Palace.

Ying Zheng led Lv Buwei, Chang Pingjun and Chang Wenjun in counterinsurgency. Old Ai Jun was a mob, vulnerable and unpopular, and was soon defeated. Lao Ai was captured alive and sent to Xianyang, where he was sentenced to chopping a car, and his two sons born with the Queen Mother were also culled, and all his servants and disciples were exiled to Shu.

Reference: Wikipedia, Baidu Encyclopedia