Question: Why did China need to resettle people into the city where Concord International Centre is found?

full_context: Document 1: Concord International Centre: Concord International Centre is a supertall skyscraper under construction in Chongqing, China. It will be tall. Construction started in 2012 and is expected to be completed in 2017.
Document 2: Jinan Center Financial City: Jinan Center Financial City is a supertall skyscraper under construction in Jinan, Shandong, China. It will be tall. Construction started in 2014.
Document 3: Hanoi: Hanoi has experienced a rapid construction boom recently. Skyscrapers, popping up in new urban areas, have dramatically changed the cityscape and have formed a modern skyline outside the old city. In 2015, Hanoi is ranked # 39 by Emporis in the list of world cities with most skyscrapers over 100 m; its two tallest buildings are Hanoi Landmark 72 Tower (336 m, second tallest in Vietnam after Ho Chi Minh City's Landmark 81 and third tallest in south-east Asia after Malaysia's Petronas Twin Towers) and Hanoi Lotte Center (272 m, also, third tallest in Vietnam).
Document 4: Sichuan: The Three Gorges Dam, the largest dam ever constructed, is being built on the Yangtze River in nearby Hubei province to control flooding in the Sichuan Basin, neighboring Yunnan province, and downstream. The plan is hailed by some as China's efforts to shift towards alternative energy sources and to further develop its industrial and commercial bases, but others have criticised it for its potentially harmful effects, such as massive resettlement of residents in the reservoir areas, loss of archeological sites, and ecological damages.
Document 5: Citigroup Centre, London: 25 Canada Square, or Citigroup Centre 2, stands at and, alongside HSBC Tower (with which it was built in tandem), is the joint 4th-tallest building in the United Kingdom (behind The Shard, One Canada Square and Heron Tower). Designed by César Pelli & Associates, construction of the 45-storey tower - undertaken by Canary Wharf Contractors - began in 1998 and was completed in 2001, with Citigroup leasing the building from the outset. The building was bought by RBS in 2004 along with 5 Canada Square (leased to Bank of America) for $1.12 billion. Subsequently, on 2 July 2007, CGC2 was individually sold to a joint venture between Quinlan Private and PropInvest for £1 billion (US$2 billion). Citigroup pay £46.5 million a year in rent for the tower, generating a yield of 4.6% to the owners. The east facing side of 25 Canada Square up to level 40 is configured for use by tenants.
Document 6: Sichuan: Sichuan has been historically known as the "Province of Abundance". It is one of the major agricultural production bases of China. Grain, including rice and wheat, is the major product with output that ranked first in China in 1999. Commercial crops include citrus fruits, sugar cane, sweet potatoes, peaches and grapes. Sichuan also had the largest output of pork among all the provinces and the second largest output of silkworm cocoons in 1999. Sichuan is rich in mineral resources. It has more than 132 kinds of proven underground mineral resources including vanadium, titanium, and lithium being the largest in China. The Panxi region alone possesses 13.3% of the reserves of iron, 93% of titanium, 69% of vanadium, and 83% of the cobalt of the whole country. Sichuan also possesses China's largest proven natural gas reserves, the majority of which is transported to more developed eastern regions.
Document 7: Sichuan: Sichuan consists of two geographically very distinct parts. The eastern part of the province is mostly within the fertile Sichuan basin (which is shared by Sichuan with Chongqing Municipality). The western Sichuan consists of the numerous mountain ranges forming the easternmost part of the Qinghai-Tibet Plateau, which are known generically as Hengduan Mountains. One of these ranges, Daxue Mountains, contains the highest point of the province Gongga Shan, at 7,556 metres (24,790 ft) above sea level.
Document 8: Sichuan: In the 20th century, as Beijing, Shanghai, Nanjing, and Wuhan had all been occupied by the Japanese during the Second Sino-Japanese War, the capital of the Republic of China had been temporary relocated to Chongqing, then a major city in Sichuan. An enduring legacy of this move is that nearby inland provinces, such as Shaanxi, Gansu, and Guizhou, which previously never had modern Western-style universities, began to be developed in this regard. The difficulty of accessing the region overland from the eastern part of China and the foggy climate hindering the accuracy of Japanese bombing of the Sichuan Basin, made the region the stronghold of Chiang Kai-Shek's Kuomintang government during 1938-45, and led to the Bombing of Chongqing.
Document 9: Sichuan: Sichuan was China's most populous province before Chongqing became a directly-controlled municipality; it is currently the fourth most populous, after Guangdong, Shandong and Henan. As of 1832, Sichuan was the most populous of the 18 provinces in China, with an estimated population at that time of 21 million. It was the third most populous sub-national entity in the world, after Uttar Pradesh, India and the Russian Soviet Federative Socialist Republic until 1991, when the Soviet Union was dissolved. It is also one of the only six to ever reach 100 million people (Uttar Pradesh, Russian RSFSR, Maharashtra, Sichuan, Bihar and Punjab). It is currently 10th.
Document 10: Sichuan: In the middle of the 17th century, the peasant rebel leader Zhang Xianzhong (1606–1646) from Yan'an, Shanxi Province, nicknamed Yellow Tiger, led his peasant troop from north China to the south, and conquered Sichuan. Upon capturing it, he declared himself emperor of the Daxi Dynasty (大西王朝). In response to the resistance from local elites, he massacred a large native population. As a result of the massacre as well as years of turmoil during the Ming-Qing transition, the population of Sichuan fell sharply, requiring a massive resettlement of people from the neighboring Huguang Province (modern Hubei and Hunan) and other provinces during the Qing dynasty.
Document 11: Golden Eagle Tiandi Tower B: Golden Eagle Tiandi Tower B is a supertall skyscraper under construction in Nanjing, Jiangsu, China. It will have a height of . Construction began in 2013 and is expected to end in 2018.
Document 12: Chengdu Greenland Tower: Chengdu Greenland Tower is a supertall skyscraper under construction in Chengdu, Sichuan, China. It will have a height of with 101 floors. Construction began in 2014 and is expected to end in 2018. It will become the tallest building in Chengdu and southwestern China.
Document 13: Sichuan: The majority of the province's population is Han Chinese, who are found scattered throughout the region with the exception of the far western areas. Thus, significant minorities of Tibetan, Yi, Qiang and Nakhi people reside in the western portion that are impacted by inclement weather and natural disasters, environmentally fragile, and impoverished. Sichuan's capital of Chengdu is home to a large community of Tibetans, with 30,000 permanent Tibetan residents and up to 200,000 Tibetan floating population. The Eastern Lipo, included with either the Yi or the Lisu people, as well as the A-Hmao, also are among the ethnic groups of the provinces.
Document 14: Sichuan: From 1955 until 1997 Sichuan had been China's most populous province, hitting 100 million mark shortly after the 1982 census figure of 99,730,000. This changed in 1997 when the Sub-provincial city of Chongqing as well as the three surrounding prefectures of Fuling, Wanxian, and Qianjiang were split off into the new Chongqing Municipality. The new municipality was formed to spearhead China's effort to economically develop its western provinces, as well as to coordinate the resettlement of residents from the reservoir areas of the Three Gorges Dam project.
Document 15: List of tallest buildings in Shenzhen: Shenzhen, a major city and Special Economic Zone in Guangdong, China, is home to 1108 completed high-rises. The tallest building in Shenzhen is the Ping An Finance Centre, upon its topping out in 2015. It is also currently the fourth tallest in the world. The second and tallest fully completed building in the city is the Kingkey Finance Tower. The third tallest building is Shun Hing Square (otherwise known as the Diwang Building, 地王大厦), which stands with 69 stories. It was the tallest all-steel building in China at its completion in 1996. Shenzhen's high-rise building boom shows no signs of slowing down, with numerous proposals for skyscrapers taller than .
ground_truth: the Three Gorges Dam project.
sub_queries: Concord International Centre >> located in the administrative territorial entity Answer: Chongqing
Why did China need to resettle people into Chongqing ? Answer: the Three Gorges Dam project.