The Kazakhstan focussed oil and gas junior is due a total of US$23mln from the sale of the unit.
Chinese firm Xinjiang Zhundong Petroleum Technology, which is listed on the Shenzhen Stock Exchange, in January agreed to purchase Galaz through a deal worth US$100mln.
The transaction was for US$50mln of cash, and also saw the Chinese buyer take on shareholder loans.
Roxi had owned a 34.22% stake in Galaz.
Proceeds from the sale are earmarked for deep wells at the flagship BNG project.