It was quite cooler weather there than in Beijing, so that was nice. To take into account the crowdeness here, it was averagely crowded, but also the crowds are divided by a space on a single boat, so it was quite ok. And it is more like a park, so you do not enjoy fully the nature, which is a pity cos the nature is kinda beautiful there. I read that there is also a possibility to hike around, which might be more fun I believe.