This is a rockwork and facade stonework project. The key points and difficulties are shown as below:

   1. Rockery piled up by stone. The key points lie on debugging water stream, unity and change of granite. The thickness, width and location of granite should not only follow its rules, but also be well-arranged both uniformly and variedly. The water flow should be quiet and gentle to match the tranquil surroundings. The five water streams should have their own features but not break the overall design rules.

   2. Space transformation of caves. It should seek the fun and changes of space which might be private, open, tortuous and peaceful. The connection of spaces should has rhythmical change, sometime broken, sometimes continuous, to pursue the diversity of space-level.

   3. Texture of caves. The surface texture of caves shall be smooth to protect hyperactive children from injure, and pay attention to both rhythm and changes at the meantime.