First, the general city bottle flowers are used tap water, because the tap water contains chlorine, it should be placed for a few days, so that after the full volatilization of chlorine, and should be changed once a day. Second, for the mold and rotting bacteria, the leaves in the water must be removed. Third, the squid will be cut and scorched by fire to prevent sapling nutrient release and rot. Fourth, dipping the flower branch in water can prevent shearing from being contaminated by contact with the outside air. Fifth, due to flowers and should add "preservatives." Daffodils can be added with 10% saline in bottle water; plum blossoms and peach blossoms can be added with a little sulfuric acid in water; chrysanthemum and peony can be added to aspirin in bottle water; aster can be added with 1% sugar solution in water. The bottle is inserted into other flowers and can be classified according to the above-mentioned examples.