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"Career or life? This has become a difficult question for most parents born in the 1980s when it comes to the decision about having another child," said Zheng Zhenzhen, a researcher at the Chinese Academy of Social Sciences' Institute of Population and Labor Economics, who specializes in child research in China.

"China has been investing in infrastructure in South America for a while," Leeds said. "So, from our perspective, we don't think that's news - just additional competition. Brazil and Argentina still have a long way to go, but these investments are certainly closing the gap on their ability to compete with the US."

"By providing better care and a fair waiting system for the pilgrims, people will be unlikely to choose illegal hajj tours," Dai said.

"China is already our largest customer when it comes to natural gas, and with the economy taking greater strides and tremendous growth seen in petrochemicals, Shell will continue having a strong focus on investing in petrochemical manufacturing inside the country," he said.

"But now we have been learning advanced technologies from foreign countries, digesting and absorbing, and eventually developed our own innovations over the past years, finally laying a technological basis for an engineering prototype," Sun said.