In 1982 thirty-three foreign oil companies submitted bids for offshore drilling rights; twenty-seven eventually signed contracts. By the mid-1980s, when offshore exploration results were disappointing and only a handful of wells were actually producing oil, China began to emphasize onshore development. To continue offshore exploration, China established the China National Offshore Oil Corporation (CNOOC) to assist foreign oil companies in exploring, developing, extracting, and marketing China's oil.