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"Beijing offered us cheap housing and food, a network of experienced mentors that were happy to take the time to help, steady access to some of the world's greatest engineering talent at a sixth of the cost of a junior engineer in Silicon Valley and access to a vast market of clients," he wrote.

Supporting Africa's development is conducive to promoting balanced and inclusive world economic growth, he said, calling on the G20 members to jointly implement the initiative agreed at last year's summit in Hangzhou, China, on supporting the industrialization of Africa and the least developed countries.

Harari told the forum audience that robots would outperform humans in many jobs and that we might no longer need taxis drivers or truck drivers, among others, in the future.

Refuting claims that the group is losing its luster, Xi told the BRICS Business Forum on Sunday that the BRICS countries are "fully confident" about their growth potential and future outlook despite headwinds that have caused setbacks in growth.

During his meeting with Duda, Zhang said that traditional friendship between the two peoples is consolidated. In the past two years, Chinese President Xi Jinping and Duda exchanged visits and the two nations work to build a comprehensive strategic partnership, which opens a new chapter in the Sino-Polish relations, Zhang said.