1. If it's emulsion, cover it, with the bottle mouth facing down, shake it hard for a few times, and then open the cover and pat it; 2. Take a syringe, place the needle horizontally in the middle of the bottle to be canned, fix the syringe with your left hand, and touch the needle with the sample bottle with your right hand. If it doesn't come out, cover the sample bottle, shake it and repeat it.

Demo is a small trial sample, which is no different from those "tasty" food promotions in supermarkets. Most of the promotional packages of major brands will give away some samples and samples. 30 ml of emulsion, 15 ml of cream and 5 ml of eye cream can last for about two months. You can carefully observe the changes of your skin through these samples to judge whether these products really suit your face. If it is suitable, don't hesitate to buy genuine products and use them well for a year or two, which will really improve your skin. If you get tired of using it for two months, it is not good for your skin. If it doesn't fit, don't hesitate to throw it away or give it away quickly. Don't let petty gain make you continue to use it.