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By the end of 2016, a total of 30 cities had metro systems, with a total length of 3,586 kilometers, up 16.8 percent year on year, according to the Ministry of Housing and Urban-Rural Development. China has 657 cities.

By the end of October, the remaining 46 public rental housing communities in the capital will be equipped with the system.

By turning on the Taobao app's augmented-reality function, customers will be able to scan key features of specific products as they tour the store. They can place an order online and then choose to either get the goods delivered or pick them up in-store.

By the end of 2017, China had swapped 10.85 trillion yuan of debt under the program, leaving 1.88 trillion yuan of such debt to be exchanged in 2018.

By the end of 2019, the country's high-speed railway operation mileage reached 35,000 km, which increased more than 5,000 km from one year earlier and accounted for nearly 70 percent of the world's total, according to the China State Railway Group Co Ltd.