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"China is entering a new stage of institutional and rule-based opening up, which is more advanced compared with the opening up of the market," said Zhang Monan, a research fellow of the China Center for International Economic Exchanges.

"But the problem is, where would these productive investments come from?" Guo said.

"China has an abundant source of organic waste ... about 2.2 billion metric tons of animal waste and about 700 million tons of agriculture crops... well enough to support the production goals. Our estimation is even more positive. Those organic wastes can support biogas production of about 160 billion cubic meters," said Zhang Dayong, secretary general of the China Biomass Energy Industry Promotion Association.

"China has given value to such sites through construction and allowing people to visit. That is a lesson Rwanda can learn from," he said, adding that most African countries have gone through a colonial period, as China had done.

"COVID-19 can be transmitted quickly and easily—even by people who aren't experiencing symptoms. Next time you go out of your home, be courteous to your neighbor: wear a mask," Scott retweeted, amplifying a post by his state's public health agency.