The Shanghai-listed unit of China State Shipbuilding Corp (CSSC) was linked to the deal by sources with knowledge of the matter, Dow Jones reported.
Rongsheng, which has changed its name to China Huarong Energy, said this week it had made good progress over a sale to an unnamed Chinese-listed company.
It has won approval for the deal from its creditor banks.
China CSSC Holdings announced net profit for the first quarter of CNY 124.5m
