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Pileus is an accessory cloud of a small horizontal extent, in the form of a cap or hood above the top or attached to the upper part of a cumuliform cloud that often penetrates it. Several Pileus may fairly often be observed in superposition, according to the world meteorological department.
Haikou is a port city and the capital of China’s island province Hainan. Haikou city is situated on the northern coast of Hainan, by the mouth of the Nandu River. Pic: https://twitter.com/Earthlings10m
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