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As per CPCB, AQI between 0 - 50 is considered "good", between 51 - 100 "satisfactory", between 101 - 200 "moderate", between 201 - 300 "poor", between 301 - 400 "very poor", and between 401 - 500 "severe" and beyond 500 is severe plus emergency.
As of May 2019, more than 160 Bell helicopters were flying in China, taking up about 30 percent of the general aviation market.
As members of the China-initiated multilateral financial institution, Ethiopia and other African countries are able to access loan and other capacity-building assistance to infrastructure projects, said Costantinos, who is also a professor of public policy at Addis Ababa University.
As of March 2019, Tencent Video had over 900 million mobile monthly users and 89 million VIP subscribers, the report said.
As part of the monetary policy operational framework, the PBOC has been opting for targeted measures since 2017, including the targeted RRR cut, to guide funds into the most needy sections of the real economy to shore up higher-quality growth, without injecting excessive money.
来源：资阳报