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"By cultivating butler talents and equipping them with practical skills, we will be able to incorporate a refined butler service into homeowners' daily lives, thus maximizing the value of service," Shi said.

"But some of the countries that were interested in creating bilateral (agreement) with us are getting a little more reluctant to deal with us because of the uncertainty of what's going on right now," she said.

"By 2023, we expect to see the deployment of hardware and software combinations that together create more trustworthy and secure IoT systems."

"China is not in favor of the so-called decoupling. … Some forefront technologies might affect national security and public welfare, and need to be included in catalog management," he told Xinhua News Agency in an article published on Saturday.

"But this zero-tolerance policy is cruel. It is immoral. And it breaks my heart," Bush wrote, adding the images were "eerily reminiscent of the Japanese-American internment camps of World War II, now considered to have been one of the most shameful episodes in US history".