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"Every time I express my belief that sex education should begin at primary school level, many of my friends are stunned, almost open mouthed. They say 'Oh, my goodness! How can we allow these innocent kids to learn about sex?'" said Li Ming, a sex education teacher at Xingzhi Primary School in the Beijing's Daxing district.

"During the peak of this craft in the mid-1980s, our company had about 130 workers and our products were exported to places like Japan. Today, we only have around 20 workers."

"Education not only refers to knowledge from textbooks, it also includes health and safety. The company will ramp up efforts to deliver high-quality resources to more children," Hou added.

"Even though the epidemic is contained, risks of infection still exist," Xu said.

"Each cow is equipped with a wearable device on its neck, so the staff can monitor feeding conditions, rumination and the animal's movement through data analysis," explained Xu Hongbo, an assistant manager of a Feihe pasture located in Heilongjiang's Gannan county.