These Mongolian drills are not far17 Aug 2018 14:09
from Daqing oil field.
Discovered in 1959 by Li Siguang, Wang Jinxi (who led No. 1205 drilling team) worked on this oilfield. This field has produced over 10 billion barrels (1.6×109 m3) of oil since production started in 1960. Daqing contained 16 billion barrels (2.5×109 m3) or 2.2 billion tons in the beginning; the remaining recoverable reserves are about 3.6 billion barrels (570×106 m3) or 500 million tons. The current production rate is about 1 million barrels per day (160×103 m3/d), making it the fourth most productive oil field in the world
https://en.wikipedia.org/wiki/Daqing_Oil_Field