In order to save money and time, I suggest you book a plane ticket from Guangzhou to Hainan and return to the island. It's much cheaper to book in advance. The spirit at first is definitely the best. It's really a waste of time to take a bus from 250 yuan to Hezhou and then from 30 yuan to Zhongshan County. Finally, when you are about to leave, take the train to Shantou, then have fun, and then fly back to Hainan from Guangzhou by air ticket. . . I think this scheme is the most labor-saving. I'm from the east, too. I am familiar with these places you mentioned.