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China is now constructing a modern airport system with three world-class airport clusters, 10 international aviation hubs and 29 regional hub airports, together with a number of non-hub airports.

China has sophisticated production lines for high-tech products, and it may take years or even decades to set up such lines elsewhere. "The question is, are you really going to save money in doing so?" Seyedin said.

China is more committed to moving away from reliance on imported nuclear power technology and building up its own homegrown systems, said insiders.

China is the world's leading producer of on-purpose propylene. The nation's production volume accounts for around 50 percent of total global capacity and is expected to continue rising by 8 percent annually.

China has tightened restrictions on solid waste imports with stricter permit reviews and more effective oversight of domestic recycling companies since the import ban on such products came into effect last month, the top environmental authority said.