Tang and Tibetan representatives covenant at Qingshui
The Zizhi tongjian reports that Zhang Yi and the Tibetan minister Shang Jiezan concluded a covenant at Qingshui.
Limits: Wikisource raw revision 803246. Line 43 says territorial boundaries remained unsettled afterward; this event does not establish a completed boundary settlement.
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Source: Zizhi tongjianRead the source