Question: Why did China need to resettle people into the place where Caiyuanba Bridge is located?

full_context: Document 1: Badong Yangtze River Bridge: The Badong Yangtze River Bridge is a cable-stayed bridge over the Yangtze River in Badong County, Hubei, China. Completed in July 2004, it carries 4 lanes of traffic on China National Highway 209. The bridge's highest tower measures and the bridge has a main span of . The bridge was constructed above the original river however the reservoir created by the Three Gorges Dam has increased the height of the water below the bridge and the clearanace is vastly reduced.
Document 2: 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 3: 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 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: 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 6: 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 7: Caiyuanba Bridge: The Caiyuanba Bridge is an arch bridge which crosses the Yangtze River in Chongqing, China. Completed in 2007, the arch spans ranking among the longest arch bridges in the world. The bridges carries 6 lanes of traffic and two track of Chongqing Rail Transit Line 3 between the Nan'an District south of the Yangtze River and the Yuzhong District to the north.
Document 8: Changshou Yangtze River Bridge: The Changshou Yangtze River Bridge is a cable-stayed bridge over the Yangtze River in the Changshou District of Chongqing, China.
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: Zhicheng Yangtze River Bridge: The Zhicheng Yangtze River Bridge is a road-rail truss bridge across the Yangtze River at Zhicheng, Hubei Province in central China. The bridge is long and carries two tracks of the Jiaozuo–Liuzhou Railway and road traffic. The bridge, built from 1965 to 1971, was the third road-rail crossing on the lower 2,884 km (1,792 mi) of the Yangtze below Yibin.
Document 11: Egongyan Bridge: The Egongyan Bridge is a suspension bridge which crosses the Yangtze River in Chongqing, China. Completed in 2000, it has a main span of . The bridge carries 6 lanes of traffic between the Nan'an District east of the Yangtze River and the Jiulongpo District to the west.
Document 12: 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 13: Lupu Bridge: The Lupu Bridge (), named after Luwan District, is a through arch bridge over the Huangpu River in Shanghai, China, connecting the city's Huangpu and Pudong districts. It is the world's second longest steel arch bridge, after the Chaotianmen Bridge in Chongqing. The bridge has a total length including approach spans of and opened on June 28, 2003. The main bridge structure is 750m long including the two side spans of 100m each, and the main span of over the Huangpu River is longer than the previous record holder for the longest arch bridge, the New River Gorge Bridge in Fayetteville, West Virginia. It cost 2.5 billion yuan (US$302 million), including US$78.04 for the main steel structure alone. It is located adjacent to the former Expo 2010 site and served as the centrepiece of the world exposition in Shanghai.
Document 14: 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 15: Nanxi Bridge: The Nanxi Bridge () is a Suspension Bridge over the Yangtze River in Nanxi District, Yibin, Sichuan, China. It is one of the longest suspension bridges in the world with a span of . The bridge carries traffic on the G93 Chengdu–Chongqing Ring Expressway and cost 660 million RMB.
ground_truth: the Three Gorges Dam project.
sub_queries: Caiyuanba Bridge >> located in the administrative territorial entity Answer: Chongqing
Why did China need to resettle people into Chongqing ? Answer: the Three Gorges Dam project.