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"By hammering on each wooden railroad tie, workers can tell how much it has eroded and when to replace them with new ones," Dong said, adding a routine check of the ties is arranged once a month.

"China has been Germany's largest trading partner in recent years. Both countries should voice a shared stance against unilateralism and support for multilateralism," said Chen Xin, an economics researcher at the Institute of European Studies at the Chinese Academy of Social Sciences.

"But there are fewer restrictions." It does seem fair that Crispr- Cas9, being largely a US-developed tool, should first be tried on humans in the US, but the hoops and red tape of the review process by the Food and Drug Administration (FDA) have delayed the most promising experiment - a team led by Dr Carl June at the University of Pennsylvania - for two years.

"By taking part in such activities as Perceiving China - Charming Wafangdian, they can see the economic growth, the cultural heritage, and beautiful scenery there. Thus, they could have a deeper understanding of China," he said.

"China has made enormous strides over the past decades in overcoming hunger and alleviating poverty. Between 1990 and 2015, China lifted more than 700 million people out of poverty, contributing immensely to the global poverty eradication effort. This unprecedented success in alleviating poverty and hunger domestically is truly remarkable," said Nicholas Rosellini, UN resident coordinator. "Unsurprisingly, many developing countries seek to learn from China and find ways to mirror China's success throughout the developing world."