Of course I enjoy Suzhou and the Yuyuan in Shanghai.
Within the larger park of the Summer Palace in Beijing is the lovely Garden of Harmonious Pleasure.
There are Chinese gardens outside China. Perhaps no surprise to find one in Singapore. Also in Sydney, Australia, and Hamilton, in New Zealand. Unexpected was the one on Staten Island, in New York. Plus I always go to the Chinese Garden Court when I visit the Met, and enjoy a stroll though it. There is so much Taihu rock scattered around the world, I wonder there is any left in the lake!
Chinese gardens that I have yet to see include RHS Bridgewater, Biddulph Grange Victoriana, and the Garden of Flowing Fragrance at the Huntingdon (California). There are many more Chinese gardens round the world.
Maxwell Hearn lecture on Chinese Gardens in art.
Architect IM Pei on Suzhou Gardens.