Guantouling is free, but it is actually a coastal hill. There is a direct tourist bus, and the specific map of Gaode points to the bus navigation. There is a big temple at the foot of the mountain. You can go and have a look. There is a buffet vegetarian restaurant next to the temple, which can solve the lunch problem and is economical. For the mountain climbing Guantouling, the suggestion is to rent an electric car to ride. The deposit is 100 and an ID card. I forgot whether the rent is 15 or 20 hours. If you don't stare blankly on the mountain, just look at the scenery, then one hour is enough.