Yes, lots. But consider the USA: about the same area as China, with <25% of the population. And the USA imports more oil than China.For the size of China, don`t they have any oil deposits on land or coastal waters.
China used to be self-sufficient in oil (one irony is that the first sizable onshore oilfields found are in territory which was controlled by Japan before WW2, so if they'd been found earlier there would have been no Pearl Harbour), but despite energetic oli exploration & vigorous exploitation of all discoveries, the economy has outpaced oil consumption.