When Qing officials suspected Đại Việt of encroaching, officials of both sides surveyed the frontier of Vị Xuyên and set a marker on Mount Xưởng Chi.
Treaty
Border survey with the Qing at Xưởng Chi
- 1726
- Southeast Asia
Treaty
When Qing officials suspected Đại Việt of encroaching, officials of both sides surveyed the frontier of Vị Xuyên and set a marker on Mount Xưởng Chi.