China National Overseas Oil Company (CNOOC) incorporated 1999 in Hong Kong:

Listed on HKSE (code: 00883)
Listed on NYSE (code: CEO)
Listed on Toronto SE (code: CNU)
Admitted to the Hang Seng Index in July 2001
Largest producer of crude oil and natural gas offshore China
Engages, globally, in exploration, development, production and sale of crude oil and natural gas.