Question: Other than Beijing, Shanghai and Tianjin, what other major city is one of China's four direct-controlled municipalities, and is also the birthplace of Chinese rally driver, Liu Caodong?
Context: China, officially the People's Republic of China (PRC), is a unitary sovereign state in East Asia.  With a population of over 1.381 billion, it is the world's most populous country.  The state is governed by the Communist Party of China, and its capital is Beijing.  It exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau), and claims sovereignty over Taiwan.  The country's major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin and Hong Kong.  China is a great power and a major regional power within Asia, and has been characterized as a potential superpower. Wang Dongfeng (; born February 1958) is a Chinese politician and current Mayor of Tianjin, one of the four direct-controlled municipalities of China.  Born in Xi'an, Wang spent his early career in his home province of Shaanxi.  He then served in the State Administration for Industry and Commerce before being transferred to Tianjin. Chongqing (), formerly transliterated as Chungking , is a major city in southwest China.  Administratively, it is one of China's four direct-controlled municipalities (the other three are Beijing, Shanghai and Tianjin), and the only such municipality in China located far away from the coast. Tianjin (), formerly known in English as Tientsin, is a metropolis in northern coastal Mainland China and one of the five national central cities of the country, with a total population of 15,469,500, and is also the world's 6th-most populous city proper.  It is governed as one of the four direct-controlled municipalities of the PRC and is thus under direct administration of the central government.  Tianjin borders Hebei Province and Beijing Municipality, bounded to the east by the Bohai Gulf portion of the Yellow Sea.  Part of the Bohai Economic Rim, it is the largest coastal city in northern China. China, officially the People's Republic of China (PRC), is a unitary sovereign state in East Asia and the world's most populous country, with a population of around /1e9 round 3 billion.  Covering approximately 9.6 e6km2 , it is the world's second-largest state by land area and third- or fourth-largest by total area.  Governed by the Communist Party of China, it exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing) and the Special Administrative Regions Hong Kong and Macau, also claiming sovereignty over Taiwan.  China is a great power and a major regional power within Asia, and has been characterized as a potential superpower. Liu Caodong (刘曹冬, 22 February 1985 – 8 June 2011) was a Chinese rally driver born in Chongqing.  He won the Chinese Rally Championship (CRC) in 2004，2006，2008 and 2010.  In 2010, Liu contested in the World Rally Championship (WRC) with the Stobart M-Sport Ford Rally Team driving a Ford Focus RS WRC 08, co-driven by Australian Anthony McLoughlin.  His name was misspelled as “Liu Chao Dong” on the entry list.  That was the first time that a Chinese driver had driven a World Rally Car in the championship.  He died of a cerebral edema caused by hypoxia alcoholism in 2011 at the age of 26. The 2010 census put Shanghai's total population at 23,019,148, a growth of 37.53% from 16,737,734 in 2000.  20.6 million of the total population, or 89.3%, are urban, and 2.5 million (10.7％) are rural.  Based on population of total administrative area, Shanghai is the second largest of the four direct-controlled municipalities of China, behind Chongqing, but is generally considered the largest Chinese city because Chongqing's urban population is much smaller. Shanghai is one of the four direct-controlled municipalities of People's Republic of China, and is further divided into 16 districts.  There is no single downtown district in Shanghai as the urban core is scattered across several districts, although Huangpu is generally considered the center of Shanghai.  Today's Huangpu is the result of the mergers of three old districts: the original Huangpu District merged with Nanshi District in 2000, and in 2011 Luwan District also merged into Huangpu.  Huangpu is now the location of the city hall, The Bund, and shopping areas including the famous Nanjing Road, Huaihai Road, and Xintiandi.  Across the Huangpu River, Pudong includes Lujiazui, the financial center of Shanghai as well as China, and has been undergoing rapid development since its formation in 1992.  In April 2009 Nanhui District was merged into Pudong.  Other prominent business and shopping areas include Xujiahui in Xuhui District, Jing'an Temple in Jing'an District, Hongqiao in Changning District, Wujiaochang in Yangpu District, and North Sichuan Road in Hongkou District.  Many universities in Shanghai are located in Yangpu, Minhang, and Songjiang Districts. Tianjin is one of the four direct-controlled municipalities of People's Republic of China, and is further divided into 16 districts. Sun Chunlan (; born May 1950) is a Chinese politician.  She currently serves as the Head of the United Front Work Department of the Central Committee of the Communist Party of China, and is a member of the Politburo of the Communist Party of China.  From 2009 to 2014, Sun served in two prominent regional posts, first as Communist Party Secretary of Fujian province, then Party Secretary of Tianjin, one of China's four direct-controlled municipalities.  Her tenure in Fujian made her the second female provincial-level party chief since the founding of the People's Republic of China in 1949 (the first was Wan Shaofen).
Answer: Chongqing