In 1959, oil was found in the Daqing Oil Field. It stopped the oil shortage in China. It was the largest oil field in the 1960s to the 1980s. It has 48 oil and gas fields. In 1960, the oil field began production. Over the next 50 years, the oil field produced over 50 million tons of oil. It has produced more than 40% of China's oil exports. It is the second most productive oil and gas field in China.