I'm going to travel to Hainan for three days on Labor Day. I want to get a tan. What mask should I apply to the hotel at night for whitening?

You must bask in the sun when you come to Hainan. The ultraviolet rays in Hainan are strong, and darkness is inevitable. My suggestion is that you can rest assured to play, bring high-magnification sunscreen, get ready for sun protection, and apply whitening hydrating mask when you return to the hotel at night to prevent sunburn and water shortage. As for what whitening mask works, it depends on your own choice. But rest assured, melanin is a substance produced by the human body to resist ultraviolet rays, and it will be excreted with the human body, so don't worry. I went back, and I naturally came back for nothing after a while.