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What is the meaning of Weihai Circle in the Arctic Circle?

The circle of Weihai in the Arctic Circle means that Weihai is very cold. The Arctic Circle is very cold, and the days when it snows heavily in Weihai are also very cold, so there is a joke to divide Weihai into the Arctic Circle. The Arctic Circle refers to an imaginary circle with latitude of 66.5 north latitude, which is the dividing line between the North Cold Zone and the North Temperate Zone, and the complementary angle where yellow and red intersect.