No tickets for Nanhu Lake, only for Green Expo Garden. Not many people, very quiet, not many staff, but very enthusiastic. The park has a large area. If you walk slowly, you can walk for 5 hours. Green Expo Garden is a unique style of buildings in various provinces. Now it's a bit bleak, but you can see that it must have beautiful scenery when it opened a few years ago. It's a good place to go for a walk.