This depends on the skin quality of the landlord. SK2 Fairy Water is more suitable for people with mixed skin and oily skin. It is not recommended for dry skin and sensitive skin, and the cuticle must not be used if it is thin, otherwise the skin will definitely be allergic and red. As for dependence, it depends on personal skin quality. If the skin is born bad, it can only be maintained for a long time. If it's not good for a while, it won't get worse if it's not used for a while, so it still varies from person to person. As for the Estee Lauder stock solution mentioned by the landlord, Shiseido Red Research Essence and sk2 Clear Glossy Dew, about 20% can be used, so early maintenance should be done, because the diet that pollutes the environment now will accelerate human aging, and early maintenance is beneficial and harmless. Can only say: maintain the old, not maintain the old. Therefore, as long as it is not too delicate skin, all the above products can be used.