Every summer, the days in Mohe are getting longer and longer, and the nights are correspondingly shorter and shorter, especially in the first half of the summer solstice. Every night, midnight is only one or two hours, and the sky is a little dark, followed by sunrise and sunrise, and the night becomes a "white night."

The most lively is the evening of the summer solstice. The long river banks in Heilongjiang are crowded with tourists from the south of the mountain and the north of the sea. They lit piles of bonfires on the riverbank and watched the magical white night landscape with lights and songs and dances. When the "night" comes, the sky is still as bright as a cloudy day, and the sunset glow from crimson to lavender lasts on the northwest horizon until midnight. The night is short and fleeting. Sunset and dawn are closely linked.

Winter in Arctic Village is long and cold. It's not white Locals call it Black Day. The sun rises lazily from the southeast every day, draws an arc in the foggy sky and then disappears in the southwest. The days are so short The sun doesn't seem to shine or heat, but just floats low in the air. When the ground is covered with heavy snow, the Arctic Village is a silvery white world.