公孙庆 / Gongsun Qing
公孙庆 / Gongsun Qing enters the wiki through Qinji 129-4 as 秦嘉’s envoy to 田儋. Qin Jia wants Qi to coordinate with the 景居 / 景驹 branch against Qin.
The mission fails because alliance is immediately entangled with title hierarchy. Tian Dan asks why Zhang Chu has set up Jing Ju without first consulting Qi. Gongsun Qing answers that Qi also made itself a kingdom without consulting Zhang Chu. The retort is formally symmetrical but diplomatically fatal: Tian Dan has him killed.
Gongsun Qing’s page therefore records a failed-envoy case inside 反秦阵营诸侯化分裂. The anti-Qin side shares an enemy, but status order, prior recognition, and who gets to authorize kingship still matter enough to block cooperation.