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Police officers wearing anti-mosquito clothing were spotted spraying insect repellent to each other and repelling mosquitoes for a police dog during a patrol in Beiwan area Altay, northwest China"s Xinjiang Uyghur Autonomous Region. 　

Located on the north bank of the Irtysh River and bordered by Kazakhstan, Beiwan area is known as one of the four "mosquito kingdoms" in the world. 　

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