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This picture taken on March 25, 2019 shows cockroach farmer Li Bingcai harvesting roaches at his farm in Yibin, China's southwestern Sichuan province. - As farmer Li Bingcai opened the door to his cockroach farm in southwest China, an insect the size of a dart flew into his face. Picking the critter off his forehead, he tossed it back into the dark room where some 10 million more of its kind scurried around, housed in wooden frames perched on shelves. The six-legged creatures may be a bugbear for most, but Li and other breeders in China are turning them into a niche business. (Photo by WANG ZHAO / AFP) / TO GO WITH AFP STORY CHINA-FARMS-FOOD-COCKROACH,FEATURE BY ELIZABETH LAW (Photo credit should read WANG ZHAO/AFP/Getty Images)

This picture taken on March 25, 2019 shows cockroach farmer Li Bingcai harvesting roaches at his farm in Yibin, China's southwestern Sichuan province. - As farmer Li Bingcai opened the door to his cockroach farm in southwest China, an insect the size of a dart flew into his face. Picking the critter off his forehead, he tossed it back into the dark room where some 10 million more of its kind scurried around, housed in wooden frames perched on shelves. The six-legged creatures may be a bugbear for most, but Li and other breeders in China are turning them into a niche business. (Photo by WANG ZHAO / AFP) / TO GO WITH AFP STORY CHINA-FARMS-FOOD-COCKROACH,FEATURE BY ELIZABETH LAW        (Photo credit should read WANG ZHAO/AFP/Getty Images)