Extended data:
There is a well named "Zhou Enlai Well" in Nalambustainprague. When the boundary was demarcated by China-Mongolia 1962, the well was included in China, and now it is a cultural relic protection unit.
Sabestine spring has basically dried up so far, and this well is called "Zhou Enlai Well". During the period of 1962, when China and Mongolia redraw the border, there was a dispute about the direction of the border in this area. The Mongolian side claimed that the well should be demarcated within its national boundaries. At this time, Premier Zhou Enlai proposed that the demarcation should be based on the internationally recognized map. Originally, this map was drawn by Sven Hedin of Northwest Scientific Expedition Team at 1927.
Zhou Enlai said that on this internationally widely circulated and recognized map, this well is located in China, and the northern side of this well indicates the national border at that time. This evidence is really strong, so the well is in China. So far, this well has become a cultural relic, protected by a guardrail.
References:
Baidu Encyclopedia-Naran Sebus Voice of Taiwan Prague