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Among the regulations, Shenzhen requires all bikes to have smart locks installed and each bike must receive maintenance and repairs every two months.

Among others, medical institutions have started playing their role in building up the area's health services.

Among the 1,250 schools ranked, 17.7 percent are located in the United States, a slight decrease from 21 percent in 2017. The next most well-represented country on the list is China, where 136 universities made the list.

Among other major grains, the production of rice reached 212 million tons, an increase of 1.1 percent compared with last year, while production of wheat increased by 0.5 percent to 134 million tons, according to the bureau.

Americans put down their forks and picked up their mobile devices this year, fueling?new online?spending records for both Thanksgiving Day and Black Friday.