What color hat should I bring to Sanya?

The ultraviolet ray in Sanya is relatively strong, and the longest ultraviolet spectrum is the red spectrum, but ultraviolet ray is the shortest ray from the red spectrum in the seven-color spectrum of the sun, so red is the most sunscreen color, and the darker the other colors except red, the better the effect. Therefore, it is recommended to wear a red hat when going to Sanya.

Sanya, a prefecture-level city in Hainan Province, is called Cliff for short and Yazhou in ancient times, also known as Lucheng, which is located at the southernmost tip of Hainan Island. Located at the southern tip of Hainan Island, it is adjacent to Lingshui County in the east, Ledong County in the west, Baoting County in the north and Nanhai in the south.