FlyOverChina | A drone flight over China's largest offshore oilfield

China's largest offshore oilfield, the Bohai Oilfield, which currently operates more than 60 producing oil and gas fields, has yielded a cumulative crude oil output exceeding 600 million tonnes. Over the past five years, its oil and gas production has grown by 5 percent annually, according to the China National Offshore Oil Corporation (CNOOC).