客卿通 / Keqing Tong
客卿通 / Keqing Tong appears in 《资治通鉴·周纪》60丨 中国第一位把持朝政的太后竟是她？ as the Qin commander sent to rescue 楚国 when 齐国, 韩国, and 魏国 attack Chu. The episode calls him a keqing, making him an outside or guest minister/commander serving 秦国.
His action proves that the Qin-Chu alignment under 芈八子 / 宣太后 is operational, not merely marital rhetoric. After 楚怀王 sends 芈横 to Qin as hostage, Qin sends Keqing Tong’s army, and the attacking coalition withdraws.