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By 2020, the market value is expected to exceed 20 billion yuan. In 2017, there were 250 million Chinese gamers, with that number expected to hit 300 million by 2020.

But the head of Indonesia's volcanology center urged people to remain calm and said the mountain's alert level has not yet been raised.

By 2020, all 22,800 villages and 211 counties along the two routes will implement comprehensive pollution controls, according to authorities.

But the existing airports, less than half the number of airports in the United States, are unevenly distributed throughout the country, making them incapable of satisfying the vast market and fast-growing travel needs, said Li Xiaojin, a professor of aviation economics at the Civil Aviation University of China in Tianjin.

By a 6-5 vote, the court overturned a three-year-old rule that contributed to the success of Brazil's biggest corruption investigation, the so-called Car Wash operation that put dozens of company executives and politicians in jail for bribes and kickbacks.