![](https://image.sggp.org.vn/w1000/Uploaded/2024/bhtgkqztgazs/2022_03_04/cotmoc314_uoar_qjfk.jpg)
Minister of Foreign Affairs Bui Thanh Son said that based on the 1985 Treaty on the Delineation of National Boundary, Vietnam and the neighboring country performed some 200-kilometer long border demarcation and built 72 border markers from 1986 to 1988. However, by 1989, Cambodia proposed to halt the border demarcation works due to some technical issues and internal political situation.
In 2005, the two countries signed the Supplementary Treaty to the 1985 Treaty on the Delimitation of the National Boundary.
From 2006 to September 2019, Vietnam and Cambodia organized hundreds of meetings and multi-level bilateral working sessions, thousands of discussions and bilateral meetings of special working teams on the border demarcation.