Which dynasty in ancient China invented oil refining?

China people first discovered and used oil in the world. Petroleum Refining originated in China and was written in the Northern Wei Dynasty. It is written about 5 12~5 18. This book introduces the extraction of lubricating oil from petroleum. The earliest oil drillers also came from China, and the earliest oil wells appeared in the 4th century or earlier. People in China use a drill bit fixed at one end of a bamboo pole to drill a well, and the depth of the well can reach about one kilometer. Oil is used to burn salt. In the 10 century, bamboo pipes were used to connect oil wells. Petroleum was officially named by Shen Kuo in the Northern Song Dynasty.