I went here from Dongguan, 90 minutes by train. The lake indeed has a jade green colour with red sandbanks. The attractions on the boat trip are of, little interest but it's nice to be out on a boat. One thing that put me off was many guys were allowed smoke on the boat and throw the butts into the lake. The whole area is littered with butts and other rubbish. I felt this questioned the 190 yuan price which is a little high. But well worth it if you time on your hands in this city.