At the comeback showcase held at the Roon Art Hall in Mokdong on the afternoon of the 23rd, the group Brave Girls (Minyoung, Yu-Jeong, Eunji, Yuna) presented the new song 'Thank You' stage.
About Yu-Jeong
An oil well is a boring in the Earth that is designed to bring petroleum oil hydrocarbons to the surface. Usually some natural gas is released as associated petroleum gas along with the oil.
 Wikipedia