The maintenance of litchi frozen stone in Qinghai is mainly to prevent cracking and bumping, while litchi frozen stone in Yin Shi is characterized by easy cracking and low hardness. Crack prevention: playing with your hands is one way, and another way is to apply a thin layer of white tea oil or baby lotion on the surface of the seal when not in use, and then apply oil after a while. Anti-collision: Qinghai frozen stone has lower hardness than Qingtian stone and Shoushan stone, so it can be marked with nails. Usually packed in small plastic self-sealing bags to prevent water loss and cracking. It is best to pack it in printed boxes.

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