The company sticks to the business philosophy of ?Customer first and service first? and the operating concept of ?Pursuing perfection rather than large scale?. With the long-term goal of ?Seeking existence based on service and running after double wins based on the brand?, Douwin has become the distributor of many world-famous petroleum chemical enterprises such as PETROCHINA, SINOPEC, CNOOC and BASF, to name but a few. Above all, with the extensive experience accumulated over the years, it ...