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Beginning on Tuesday at American and Thursday at United, passengers who do not wear a mask while traveling could be flagged for each airline's list of restricted flyers, possibly causing them to be barred from flying with the carrier again, the carriers announced on Monday.

Beijing witnesses flowing sand and dust on April 16, 2020. [Photo/National Meteorological Center]

Before the change, people observed the festivals after work if they fell on workdays. The new status was aimed at bolstering people's pride in traditional Chinese culture.

Beijing has many designated lanes for bicycles. However, cars are increasingly encroaching on them, and they are often crowded with parked cars.

Beijing has set a population cap of 1.3 million by 2035 for Tongzhou district, its municipal subsidiary administrative center, according to a draft plan released late on Thursday.