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Beijing received more than 4.6 million tourists during the May Day holiday. Tourism revenue generated during the period totaled 4.18 billion yuan (around 590 million U.S. dollars), according to Beijing Municipal Bureau of Culture and Tourism.
Beijing has 22 metro lines now, with three newly opened in 2018.
Behind the growing sales of 3M's respiratory protection products is its research and development team. A group of leading researchers from the 600-member 3M innovation lab in China has focused on developing top air quality technology or applications for the Chinese market, according to Shafer.
Beijing's guideline requires that buyers do not change the interior decoration of the houses for five years.
Before 2030, the province should create a clean, safe and efficient modern energy system and accumulate experiences in reform that can be replicated elsewhere, the guideline said.
来源：资阳报