I went to Happy Valley 13 years ago, and I went with friends 12 years later. I went there during the Dragon Boat Festival holiday. There were a lot of people. The most recommended project was the speed roller coaster. It was really good. The experience was five stars. I personally felt that it was the best roller coaster in Happy Valley. Overall awesome, fun and fun. There is also the Maya Skyfall performance, must see, very shocking