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"Every night I turn on soft music and listen to an episode of a storytelling program to relax," said Wang Zhiquan, an office worker in his 30s living in Shanghai.

"Everybody can sell air purifiers when you have PM2.5 at 300 outside for two weeks, because it does not need a great company to achieve that," said Frank Hammes, CEO of Swiss air purification provider IQAir.

"E-commerce provides access so that both the consumer and the producer can meet in a timely way. This provides a very efficient way to link the producer and the consumer. Many of these small e-commerce companies and small traders use e-commerce to link the market and producers. That is something new and it has solved many problems," Li said.

"Economists nearly unanimously agree that tariffs have negative economic effects, and this has been observed time and time again when countries impose tariffs," said Erica York, an analyst with the Center for Federal Tax Policy at the US Tax Foundation, who wrote the report titled The Impact of Enacting President Trump's Tariffs. The foundation is an independent tax policy nonprofit.

"Except for mergers and acquisitions, we have not been involved in public land acquisitions in the past two years. To avoid risks, we will continue to control the pace of buying," Sun said.