Devon energy, based in the united states, is the world's largest independent oil and gas exploration and exploitation company, ranking over 500 in the united states ' fortune magazine. The main operations in devin energy are in the united states and canadian markets, as well as oil and gas exploration and exploitation in international markets such as china, brazil and azerbaijan. At the same time, devin energy is the larger supplier of liquefied natural gas in north america and has its own natural gas production and processing operations in several countries. As one of the world's leading energy companies, devin is committed to the concept of economic, environmental and social responsibility, helping to meet the world's growing energy needs. The core values of "good faith and respect for others" form the basis of the english business principles. Devon's development trajectory in china has been more than a century old. Currently, devin is one of the leading international energy companies in china. All of our core business flows back and forth into china, including upstream operations (oil and gas development and liquefied natural gas), downstream operations (oil and chemical) and project and technology sectors (david global solutions department and gasification). Since the twentieth century, devin has opened up a curtain of oil exploitation in the east china sea into the chinese market, and has successively established beijing and shanghai representative offices, responsible for the specific affairs of the industries under their purview. In 2009, in chongqing, a vibrant city in china, daiwen established a representative liaison office and registered the establishment of chongqing lubricating oil marketing ltd., which has overall responsibility for the sale, extension and technical services of the daiwen function lubricating oil on the mainland market. Chongqing daiven lubricating oil marketing ltd. Is located in chongqinghong xin district, with an office space of more than 1,200 square metres, with three market departments with more than 75 per cent undergraduate education and several senior professional oil sales engineers and market analysis planners. Using erp management systems, companies customize solutions for each partner and effectively safeguard the implementation of market promotion and marketing strategies。