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"For the first time we have detected a potential toxin of concern," Anne Schuchat, principal deputy director at the CDC, said Friday in a conference call with reporters.

"General Secretary Xi has set the goal, we need to figure out how to realize it, how to innovate," an official with the preparatory committee of Xiongan told Xinhua.

"From floor to ceiling in every single room were manuscripts – papers that were heaped, one big pile on top of another," said An, founder of the Edgar and Helen Snow Studies Center in China. "Most of the papers were put into simple file-holders she had cut out of grocery boxes from the local supermarket."

"First- and second-tier cities are the driving force behind the expansion of the smaller retail format and the sector has a great potential to develop," the 2017 China Convenience Store report stated.

"Green mountains and clear water can be mountains of gold and silver," said Zhu Qizhen, a researcher at China Agricultural University.