Title: Mengjiang
Content:  Mengjiang (Mengkiang), also known in English as Mongol Border Land or the Mengjiang United Autonomous Government, was an autonomous area in Inner Mongolia, formed in 1939 as a puppet state of the Empire of Japan, then from 1940 being under the nominal sovereignty of the Reorganized National Government of the Republic of China (which was itself also a puppet state). It consisted of the previously Chinese provinces of Chahar and Suiyuan, corresponding to the central part of modern Inner Mongolia. It has also been called Mongukuo or Mengguguo (or Mengkukuo; ) (in analogy to Manchukuo, another Japanese puppet state in Manchuria). The capital was Kalgan, from where it was under the nominal rule of Mongol nobleman Demchugdongrub. The territory returned to Chinese control after the defeat of the Japanese Empire in 1945.
Title: Mengjiang
Content:  Formed on May 12, 1936, the Mongol Military Government (蒙古軍政府) had Prince Yondonwangchug of Ulanqab as its first chairman. It was renamed in October 1937 as the Mongol United Autonomous Government (蒙古聯盟自治政府). On September 1, 1939, the predominantly Han Chinese governments of South Chahar and North Shanxi were merged with the Mongol United Autonomous Government, creating the new Mengjiang United Autonomous Government (蒙疆聯合自治政府). The capital was established at Zhangbei (Changpei), near Kalgan (Zhangjiakou), with the government's control extending around Hohhot. On August 4, 1941, it was again renamed: the Mongolian Autonomous Federation (蒙古自治邦). In 1939 Wang Jingwei reorganized the remnants of the occupied Chinese government for a Japanese puppet state, commonly referred to as the Wang Jingwei Regime, or the Reorganized National Government, with its capital in Nanjing. Mengjiang was nominally incorporated into the regime in 1940, though it remained autonomous from Nanjing. Mengjiang capitulated in 1945 when it was invaded by the Soviet Red Army and Mongol Red Army as part of the Manchurian Strategic Offensive Operation. Most of the area, with the notable exception of Kalgan, is now part of Inner Mongolia in the People's Republic of China.
Title: Meng Kang
Content:  Tall and thin, Meng Kang is nicknamed "Jade Flagpole" for his fair complexion. He is from Zhending Prefecture (真定府; around present-day Zhengding County, Hebei).
Title: Nenjiang City
Content:  Nenjiang (also known as Mergen at the time) was the capital (seat of the Military Governor) of Heilongjiang Province in 1690–1699.
Title: Mengjiang
Content: Mongolian Royal Family ; Japanese Central Academy of Kalgan ; Directorate General of Communications ; Bank of Mengjiang ; Mongolian Military Command Headquarters ; Mengjiang National Army ; United Autonomous Mongolian Aimags ; Autonomous Government of Northern Shanxi ; Autonomous Government of Southern Chahar ; The United Autonomous Government of Mengjiang ; Government Mongol administrative uls ; People’s Autonomous Government of Eastern Mongolia ; Inner Mongolia Pailingmiao Autonomous Political Council (Mongolian political movement) 
Title: Minggang
Content:  Minggang is a town in the province of Henan in Central China. The population in (2005) was 69,100.
Title: Mengjiang
Content:   The Japanese established the Bank of Mengjiang that printed its own currency without years on it. Some traditional local money shops also made currency with the Chinese year numbering system, such as the Jiachen Year (甲辰年), on it. The Japanese had mineral interests in their created state of Mengjiang. In one example the Japanese put the iron mine in Xuanhua Longyan into production, with a reserve of 91,645,000 tonnes in 1941; and analyzed the reserves of coal in land, one was 504 tonnes, and another with a potential production of 202,000 of tonnes (1934). The Mengjiang iron deposits were exported directly to Japan. At the same time, the Japanese sought the coal reserves of Suiyuan (another Mengjiang occupied sector), including one of 417 million tonnes, and one with a potential extraction of 58,000 tonnes in 1940.
Title: Mengzhou
Content:  Mengzhou is a County-level city in Henan province, People's Republic of China. It is administered by the prefecture-level city Jiaozuo. Its population in 1999 stood at 341,190.
Title: World War II by country
Content:  Mengjiang was established in Inner Mongolia as a puppet state of Japan, and contributed troops which fought alongside the Japanese in China. It ceased to exist following the Soviet invasion in 1945.
Title: Jiangmen
Content:  Jiangmen, alternately romanized in Cantonese as Kongmoon, is a prefecture-level city in Guangdong Province in southern China. As of the 2020 census, its three urban districts, plus Heshan City being conurbated, with 2,657,662 inhabitants are now part of the Guangzhou–Shenzhen conurbation with 65,565,622 inhabitants and the entire prefecture had a population of about 4,798,090 inhabitants.

Question: What is the capital of Mengjiang?
Answer: Zhangjiakou.
Kalgan.
Zhangjia kou.
Khaalgan.
Chuulalt Khaalga.
Imiyangga Jase.