Pruning and modeling of pine and cypress bonsai: In order to enhance the aging of pine and cypress trunk and make it more interesting, the trunk can be properly decorated to make up for the defect that the stump is not old enough. First, determine the trunk to be carved, scrape off the old skin on the trunk with a knife, select the viewing surface, white the part to be carved with white chalk, and use a single-sided knife for a moment to separate it from the surrounding tissues. When carving, hold the back of the knife with the middle finger or forefinger of the other hand to increase the strength and make the knife edge reach the xylem. Pry open the carved bark with a knife and tear it off from top to bottom. Pay attention to slow down when tearing at the base of the trunk, so as not to hurt the root. Cut off the bark torn back along the surface of the basin soil, and then scrape off the cambium parenchyma cells on the surface of the xylem with a knife, so that the xylem is easier to weather in the wind, wind and sun. Then smooth the wound with a sharp knife and coat it with sealing material. In the future, the mixture of stone and sulfur will be painted on the stems, which will be yellow at first, and will turn white after a period of maintenance.