公孙贾 / Gongsun Jia
公孙贾 / Gongsun Jia belongs to the 公孙鞅 / 商鞅 punishment branch around 太子嬴驷’s violation of the new Qin law. 《资治通鉴·周纪》13丨 公孙鞅苛刻变法惹杀身（2） describes the prince’s tutors being punished because the heir himself cannot be directly punished; in the standard later identification preserved by the wiki branch, Gongsun Jia is the tutor marked by facial tattooing.
The figure matters less as an independent biography than as evidence for 高位执法信号. Punishing a prince’s teacher makes the new law visible at the top of 秦国’s hierarchy, but it also converts legal credibility into personal and elite resentment.
《资治通鉴·周纪》25丨赵良对商鞅说：你不配 later uses Gongsun Jia’s face tattoo in 赵良’s warning against Shang Yang. Alongside 公子虔’s suffering and Zhu Huan’s death, the tattoo becomes one of the named injuries showing why Shang Yang’s reform success did not create stable political security for its architect.
Connections
- 公孙鞅 / 商鞅 - reformer whose law-enforcement choice marks him.
- 太子嬴驷 and 公子虔 - prince and paired punished tutor figure in the same branch.
- 秦国 and Shang Yang Reforms / 商鞅变法 - state and reform package behind the punishment.
- High-Status Law-Enforcement Signal / 高位执法信号, Warring States Reform Backlash / 战国变法反噬, and People-Based Political Security / 民心型政治安全 - concepts his case makes concrete.