曹谦 / Cao Qian (late Han)
Hanji 922 presents Cao Qian as the official sent to administer 巴郡 after 陈鲍 explains the 板楯蛮 rebellion as a consequence of official abuse. 汉灵帝 pairs Cao Qian’s appointment with amnesty, and the source says the Bandun people surrender quickly.
Cao Qian’s significance in the wiki is mostly functional: he marks the personnel-change side of 查因安抚式治理. The episode uses his appointment to show that removing extractive local governance can settle a revolt more effectively than an expeditionary campaign.