A new Chinese mega-city, bigger than Britain and 137 times the size of London, is set to rise in the mainland. The humongous Jing-Jin-Ji city will soon become the home of over 100 million people.

Currently, authorities are undergoing extensive work to put up the 'megatropolis'. They plan to build extensive high-speed railway and motorway networks to significantly reduce residents' commute time. The goal is a "one-hour commuting circle" across the area.

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"The biggest change is in transportation," Zhang Zhongming, a Hebei-based humanities professor, told NBC News, adding that a one-day trip to Hebei will then be cut down to only a few hours.

By the end of the decade, eight new intercity railways will be completed, and another 16 will be added by 2050. According to NBC, the Chinese government allocated around 250 billion yuan ($36.3 billion) to build 700 miles of railway in the region within three years.

The Jing-Jin-Ji is located on coast of Bohai Sea in the north-east part of the country. The mega-city aims to consolidate some of China's most populous cities including Beijing, Tianjin, and Hebei with population figures of 20 million, 30 million, and 74.2 million, respectively. It also plans to include Shijiazhuang, Chengde, and Qinghuangdao.

Jing-Jin-Ji, which means Beijing, Tianjin, and Hebei, will span a massive 84,403 square miles. Its development was approved by the National Development and Reform Commission in 2014.

Meanwhile, despite of its massive size, Beijing will still remain as China's capital and the political and financial center. The city aims to reduce its manufacturing industry and shift its focus on energy-saving and environmental sectors, the Daily Mail reported.

"The biggest advantage of Jing-Jin-Ji is that we can have a more coordinated development and better environmental plan over a wider area," Zhang Chao, an official from the Tianjin Free Trade Zone, said.

TagsJing-Jin-Ji, Mega-city, china, Beijing, Tianjin, Hebei