上庸 / Shangyong

上庸 / Shangyong enters the wiki through 《资治通鉴·周纪》53丨秦惠王用张仪换地皮 as the six-county ransom package a Chu favorite claims 秦国 might offer to save 张仪. The source does not develop Shangyong independently; it functions as a persuasive object inside the palace backchannel.

The argument to 郑袖 is that Qin may send Shangyong’s six counties and a beautiful woman to redeem Zhang Yi. The territory gives the warning political weight, while the woman gives it immediate court-status stakes for Zheng Xiu.

《资治通鉴·周纪》60丨 中国第一位把持朝政的太后竟是她？ changes Shangyong from possible ransom object to returned diplomatic territory. In 304 BCE, 秦昭襄王 and 楚怀王 meet at 黄棘, renew the Qin-Chu alliance, and Qin returns Shangyong to 楚国. The same place therefore appears in two adjacent Qin-Chu episodes as a bargaining and repair object.

Connections

• 张仪 - figure allegedly valuable enough for Qin to redeem.
• 郑袖, 楚怀王, and 宫廷后门自救 - court path through which the rumor works.
• 秦国 and 楚国 - states framed by the possible ransom.
• 可交换功臣 - adjacent concept around turning a minister’s body into exchange value.
• 秦昭襄王, 黄棘, 战国联姻外交, and 战国同盟转向 - Zhouji 60 returned-land alliance repair.