Article in English: Although drinking water will not directly increase your skin's water content, it does help flush your body and skin of harmful toxins. By increasing your water intake, you can help your skin stay healthy and receptive to moisturizing.  No single water drinking recommendation is right for everyone. On average, it is advised that men drink 15.5 cups (3.7 liters) and women drink 11.5 cups (2.7 liters) of water per day.  Do not consume large quantities of water in the hopes of hydrating your skin. As long as you're drinking a normal amount of water, your skin is benefiting. UV rays can weaken your skin barrier and rob your skin of moisture. Wear sunscreen and re-apply it periodically throughout the day during the summer or when spending long periods of time outside. Hot water can dry out your skin and negate the healing properties of your skin care products. Cool water is ideal for rinsing your face, but lukewarm water is fine if you have sensitive skin. Healthy skin usually equates to a hydrated face, and vitamins can help keep your skin healthy. Try taking supplements that include vitamin B, vitamin C, and omega-3 acids. If you don't like taking vitamins, eat vitamin-rich foods like bananas, broccoli, nuts and seeds, spinach, strawberries, lemons, potatoes, and pears. Humidifiers can not only moisturize a room but also dehydrated skin. When living in dry climates or during dry seasons, put a humidifier in your room to soothe your skin. Ideally, the humidity percentage in your room should be between 30 and 50 percent. Some people experience increased dehydration in the winter, while others are more prone to it in the summer. If you notice a seasonal cycle when it comes to your skin troubles, increase your moisturizing routine for the rest of the season.  Because dry weather often causes dehydrated skin, moving to a climate with low humidity may cause similar skin conditions as a drier season might.  You may, for example, moisturize twice daily instead of once.

Summary in Chinese:
每天多喝水。 在面部接触直射的阳光之前，涂抹防晒霜。 用温水或凉水洗脸。 服用能够促进皮肤保持水分充足的维生素。 睡觉时打开房间里的加湿器。 在天气干燥时注意润肤。