In long-term gardening practice, the commonly used stone types for rock placement are roughly as follows: Lake stones: mainly produced in Zhejiang province. The stone lines are round and smooth, with hollow and ingenious caves, suitable for special placement or stacking stones. Lingbi stones: limestone type, produced in Lingbi County, Anhui Province. Colors include dark gray, white, red, etc., which is a relatively high-end stone material, suitable for special placement. Stone bamboo: metamorphic rock type, produced in Changshan, Yushan area at the border of Zhejiang and Jiangxi provinces. Colors include gray-green, brown-red, earth-yellow, etc., used for spot scenery and opposite scenery.