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By 2020, the discharge of sulfur dioxide and nitric oxide should drop by at least 15 percent from 2015 levels. Prefecture-level and bigger cities with average concentrations of PM2.5 above the national standard of 35 micrograms per cubic meter should have their concentrations down by at least 18 percent from 2015, the plan said.

By 2025, reforms in important areas and at key links will achieve landmark results. It is set to basically complete the pilot reform tasks by that time.

But those who oppose a ban— from sellers to users — say it will force former cigarette smokers to return to their old habit or have e-cigarette smokers turn to a black market that officials say is growing for illicit cannabis-vaping products.

But the market on the whole is plagued by a lack of liquidity and low investor confidence, Hong added.

By Sunday, the province had reported a total of 247 confirmed imported COVID-19 cases and one has been discharged from hospital after recovery, it said.