Zuò Fǎ Zì Bì (To Be Trapped by One's Own Scheme)
When Shang Yang implemented his reforms in the state of Qin, he first abolished the privileges of the nobility, establishing a new system where noble ranks were granted strictly according to military merit. This deprived the nobles of their traditional right to receive rewards without effort, causing them great resentment towards Shang Yang. However, Shang Yang had the strong support of Duke Xiao of Qin, so despite their hatred, the nobles could do nothing.