Question: In what state are the headquarters of this American multinational automaker, which has a 50:50 joint venture with Changan Automobile?

Context paragraphs:
Tarfaya Wind Farm: Tarfaya Wind Farm is a wind farm in Morocco, located in 20 km from Tarfaya.  It was developed by Tarec (Trarfaya Energy Company), a 50/50 joint venture of Nareva Holding and International Power Ltd.  Tarfaya Wind Farm is owned and operated by a 50:50 joint venture between the GDF SUEZ and Nareva Holding and it is the Africa's largest capacity wind farms with 131 wind turbines and a total installed capacity of 301 MW.  It was on the list of ten “Most Outstanding African Projects in 2015”, a ranking by Jeune Afrique magazine.

Dongfeng Yulon: Dongfeng Yulon Motor Co., Ltd. (Dongfeng Yulon) is an automobile manufacturing company headquartered in Hangzhou, China and a 50:50 joint venture between the Chinese automaker Dongfeng Motor Corporation and the Taiwanese automaker Yulon Motor.  Its principal activity is the production, distribution and sale of Luxgen passenger cars in mainland China.

Changan Ford: Changan Ford (officially Changan Ford Automobile Co., Ltd.) is an automotive manufacturing company headquartered in Chongqing, China and a 50:50 joint venture between Changan Automobile and Ford Motor Company.  The company's principal activity is the manufacture of Ford brand passenger cars for the Chinese market.  The company was formed in Dec. 2012 after the decision to restructure Changan Ford Mazda, whereby Ford and Mazda agreed to work with Changan as separate joint ventures.  Currently, Changan Ford's entire production base is the largest manufacturing location outside Detroit, Michigan for Ford.  It has plants in Chongqing, Hangzhou & Harbin.

Changan Ford Mazda: Changan Ford Mazda (officially Changan Ford Mazda Automobile Co., Ltd.) was an automotive manufacturing company headquartered in Chongqing, China and a joint venture between Changan Automobile, Ford Motor Company and Mazda.  Its principal activity was the manufacture and sale of Ford and Mazda branded passenger cars in China.

Changan Mazda: Changan Mazda (officially Changan Mazda Automobile Co., Ltd.) is an automotive manufacturing company headquartered in Nanjing, China and a 50:50 joint venture between Changan Automobile and Mazda.  The company's principal activity is the manufacture of Mazda brand passenger cars for the Chinese market.  The company was formed in December 2012 after the decision to restructure Changan Ford Mazda, whereby Ford and Mazda agreed to work with Changan as separate joint ventures.

Ford Motor Company: The Ford Motor Company (commonly referred to simply as "Ford") is an American multinational automaker headquartered in Dearborn, Michigan, a suburb of Detroit.  It was founded by Henry Ford and incorporated on June 16, 1903.  The company sells automobiles and commercial vehicles under the Ford brand and most luxury cars under the Lincoln brand.  Ford also owns Brazilian SUV manufacturer, Troller, and Australian performance car manufacturer FPV.  In the past, it has also produced tractors and automotive components.  Ford owns an 8% stake in Aston Martin of the United Kingdom, and a 49% stake in Jiangling of China.  It also has a number of joint-ventures, one in China (Changan Ford), one in Taiwan (Ford Lio Ho), one in Thailand (AutoAlliance Thailand), one in Turkey (Ford Otosan), and one in Russia (Ford Sollers).  It is listed on the New York Stock Exchange and is controlled by the Ford family, although they have minority ownership (but majority of the voting power).

FAW-GM: FAW-GM Light Duty Commercial Vehicle (FAW-GM) is a commercial vehicle manufacturing company headquartered in Changchun, China, and a 50:50 joint venture between FAW Group and General Motors.  It was founded in 2009 and its activities include the Harbin Light Vehicle factory and FAW Hongta Yunnan Automobile Co Ltd.  The plants were named as "FAW Harbin Light Duty Vehicle Co.", "FAW-GM Hongta Yunnan Automobile Manufacturing Co., Ltd." and "Changchun Plant".  The company builds "Jie Fang" pickups and light commercial vehicles, with the possibility of building models for GM to sell under their marques.

BYD Auto: BYD Auto Co., Ltd. is a Chinese automobile manufacturer based in Xi'an, Shaanxi Province, and a wholly owned subsidiary of BYD Company.  It was founded in 2003, following BYD Company's acquisition of Tsinchuan Automobile Company in 2002.  Its principal activity is the design, development, manufacture and distribution of passenger cars and buses sold under the BYD brand.  BYD has achieved top rankings of J.D Power's Quality Study.  BYD has been awarded The Top Crash Facility Award.  It also has a 50:50 joint venture with Daimler AG, Shenzhen BYD Daimler New Technology Co., Ltd., which develops and manufactures luxury electric cars sold under the Denza brand.

Changan PSA: Changan PSA (officially Changan PSA Automobiles Co., Ltd., informally CAPSA) is an automotive manufacturing company headquartered in Shenzhen, China and a 50:50 joint venture between Changan Automobile and Groupe PSA.  Its principal activity is the manufacture and sale of DS Automobiles branded passenger cars in China.

KamaSutra (brand): KamaSutra condoms is India’s second largest condom brand.  It is manufactured by J.K. Ansell Ltd. (JKAL), which is a 50:50 joint venture between Raymond Group, India’s largest fabric and branded apparel company, and Ansell Limited.  JKAL has a condom manufacturing unit in Aurangabad in the state of Maharashtra, India with a manufacturing capacity of 350 million pieces per annum.  JKAL commenced operations in 1991 and launched KamaSutra condoms the same year.  Prior to the formation of the joint venture in 1996, the condom division was part of J.K. Chemicals Ltd., a subsidiary of the Raymond Group.

Supporting paragraphs: Changan Ford Ford Motor Company
Answer: Michigan