After Qin unified China, Zhang Liang, a scion of the powerful Han family who had served as prime ministers for three generations, plotted an assassination attempt against Qin Shi Huang to avenge his family. However, their scheme was discovered by the Court of Justice. When Zhang Liang went to Xingyang to report their plan to the royal prince and other Han loyalists, they were ambushed by the Court of Justice's sentries. Zhang Liang narrowly escaped. The reason was that the royal prince, who admired the legendary Yue king Goujian's perseverance and determination, ordered each attendee to eat a snake gall bladder to demonstrate their resolve to restore Han. The physically weak Zhang Liang, after consuming the cold-natured snake gall bladder, immediately felt unwell. While he was using the toilet, the Court of Justice's sentries stormed in, and he escaped the attack.

(Source: Bangumi, translated)