Longevity flowers can be lit. Only when they are lit in time can the height be controlled, the nutrition will become more concentrated and the lateral branches will germinate better. The method of sharpening is very simple, just cut off a part from it. Attention should be paid to the growth season, and the wound should not get wet, so that it will heal faster. After proper airing, the sharpened parts can also be inserted into the substrate, so that new plants can be cultivated with high survival rate.