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"Environmental education aims to guide students to respect and protect nature, and comply with regulations governing its protection. We hope the books will help to promote a healthy lifestyle, such as saving energy and living in a green way. The move will also promote the city's green development," he said.

"Dogs can hear high-frequency sounds that humans can't. By using such sounds, police can give the animals orders in situations in which they don't want to be heard, or from long distances," said Xu, a trainer at a police dog training base in suburban Beijing that is home to about 270 dogs.

"Driven by Xiaomi's pragmatic concerns, the cooperation will enable much more international IoT connections," Yan said.

"East Asia is the manufacturing center of the world economy, and it can and should be revived first," he said. "That would be a huge boost for the whole world."

"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.