For the friends of southern Guangdong, we don't need to go as far as Longmen Grottoes and Dunhuang Mogao Grottoes to see the grottoes. Tongtianyan is a good choice. Self-driving and driving are very convenient! It's not too hard to climb mountains. The air is very good after rain. There are not so many key people, so it's suitable for leisure travel! __________