Question: Ruan Zhenduo served in many cabinet-level positions in what puppet state in Northeast China and Inner Mongolia, which was governed under a form of constitutional monarchy?

full_context: Document 1: Mengjiang: Mengjiang (Mengkiang; ; Hepburn: Mōkyō), also known in English as Mongol Border Land or the Mongol United Autonomous Government, was an autonomous area in Inner Mongolia, existing as a puppet state of the Empire of Japan under nominal Chinese sovereignty. Formed in 1939, it consisted of the then-Chinese provinces of Chahar and Suiyuan, corresponding to the central part of modern Inner Mongolia. It is occasionally called Mengguguo (or Mengkukuo; ) (in analogy to Manchukuo, another Japanese puppet state in Manchuria). The capital was Kalgan, and the ruler was Demchugdongrub.
Document 2: Chiang Kai-shek: Chiang Kai-shek (October 31, 1887 – April 5, 1975), also romanized as Chiang Chieh-shih and known as Chiang Chungcheng, was a Chinese statesman, political and military leader who served as the leader of the Republic of China.
Document 3: Liaoning: Liaoning () is a province of China, located in the northeast of the country. The modern province was established in 1907 as Fengtian or Fengtien province and the name was changed to Liaoning in 1929. It was also known as Mukden province at the time, for the Manchu pronunciation of Shengjing, the former name of the provincial capital Shenyang. Under the Japanese-puppet Manchukuo regime, the province reverted to its 1907 name but the name Liaoning was restored in 1945 and again in 1954.
Document 4: Manchukuo: Manchukuo (: "Mǎnzhōuguó"literally: " State of Manchuria" ) was a puppet state in Northeast China and Inner Mongolia, which was governed under a form of constitutional monarchy. The area, collectively known as Manchuria by westerners and Japanese, was designated by China's erstwhile Qing Dynasty as the "homeland" of the ruling family's ethnic group, the Manchus. In 1931, the region was seized by Japan following the Mukden Incident and a pro-Japanese government was installed one year later with Puyi, the last Qing emperor, as the nominal regent and emperor. Manchukuo's government was abolished in 1945 after the defeat of Imperial Japan at the end of World War II. The territories formally claimed by the puppet state were first seized in the Soviet invasion of Manchuria in August 1945, and then formally transferred to Chinese administration in the following year.
Document 5: Jin Youzhi: Jin Youzhi (17 August 1918 – 10 April 2015), born Aisin-Gioro Puren, was the nominal head of the Aisin-Gioro clan, the imperial clan of the Manchu-led Qing dynasty, from 1994 until his death in 2015. He was the fourth and youngest son of Prince Chun, and a younger half-brother of Puyi, the Last Emperor of China. Instead of using his Manchu clan name "Aisin-Gioro" as his family name, Puren adopted "Jin" as his new family name. "Jin" means "gold" in Mandarin, as does "Aisin" in the Manchu language. His courtesy name was "Youzhi"; he is best known as "Jin Youzhi". The Chinese media referred to him as "The Last Emperor's Younger Brother" or "The Last Imperial Younger Brother (最后的皇弟).
Document 6: Museum of the Imperial Palace of the Manchu State: The Museum of the Imperial Palace of the Manchu State () is a museum in the northeastern corner of Changchun, Jilin province, northeast China. The Palace was the official residence created by the Imperial Japanese Army for China's last emperor Puyi to live in as part of his role as Emperor of the Japanese puppet state of Manchukuo. In the People's Republic of China the structures are generally referred to as the Puppet Emperor's Palace & Exhibition Hall. It is classified as a AAAAA scenic area by the China National Tourism Administration.
Document 7: Puyi: Puyi (; 7 February 190617 October 1967), of the Manchu Aisin Gioro clan, commonly known as Pu Yi, was the last Emperor of China, the second-to-last Khan of Mongolia and the twelfth and final ruler of the Qing dynasty. When a child, he ruled as the Xuantong Emperor () in China and Khevt Yos Khaan in Mongolia from 1908 until his forced abdication on 12 February 1912, after the successful Xinhai Revolution. From 1–12 July 1917, he was briefly restored to the throne as emperor by the warlord Zhang Xun.
Document 8: Postage stamps and postal history of Manchukuo: Manchukuo (Japanese for "Manchu State") was a Constitutional monarchy in Manchuria and eastern Inner Mongolia, the region being the historical homeland of the Manchus who founded the Qing Dynasty of China. In 1931, it was seized by Japan following the Mukden Incident and in 1932, a puppet government was created. This was abolished in 1945 after the defeat of Imperial Japan at the end of World War II.
Document 9: Ren Fuchen: Ren Fuchen (; April 1884 – November 1918) was a Chinese member of the Bolshevik party and a commander of a Chinese regiment of the Soviet Red Army during the Russian Civil War. He joined the Bolsheviks in 1908. He was killed in action during a battle against the White Army forces of Alexander Kolchak. He was known as "China's first Bolshevik". In the aftermath of the Russian Revolution, he raised a regiment of 1,500 Chinese expatriates for the Soviet cause. He was killed in November 1918. The Soviet Union awarded him a Red Flag medal in November 1989, and a statue of him was erected in Tieling, his hometown, in 1993.
Document 10: Fushun War Criminals Management Centre: Fushun War Criminals Management Centre (), also known as Liaodong No. 3 Prison or Liaoning No. 3 Prison, was the site of the re-education of Manchukuo, Kuomintang and Japanese prisoners of war, held by China from 1950 onwards. It was located in the Xinfu District, Fushun, Liaoning. Among the inmates were Puyi, the last emperor of China and former puppet emperor of Manchukuo, his younger brother Pujie and several other important World War II figures such as Xi Qia, Zang Shiyi and Zhang Jinghui. Part of the prison site remains in use, but the older section has been turned into a museum depicting the history of Fushun war criminals management centre and the life of the people who worked or were interned there.
Document 11: Zhang Jinghui: Zhang Jinghui (Chang Ching-hui; ; Hepburn: "Chō Keikei"); (1871 – 1 November 1959) was a Chinese general and politician during the Warlord era. He is noted for his role in the Japanese puppet regime of Manchukuo in which he served as its second and final Prime Minister.
Document 12: Ruan Zhenduo: Ruan Zhenduo (; Hepburn: "Gen Shintaku"; 1893 –1973), was a politician in the early Republic of China who subsequently served in a number of Cabinet-level positions in the Empire of Manchukuo.
Document 13: Hong Chengchou: Hong Chengchou (1593–1665), courtesy name Yanyan and art name Hengjiu, was a Chinese official who served under the Ming and Qing dynasties. He was born in present-day Liangshan Village, Yingdu Town, Nan'an County, Quanzhou, Fujian Province, China. After obtaining the position of a "jinshi" (進士; successful candidate) in the imperial examination in 1616 during the reign of the Wanli Emperor, he joined the civil service of the Ming Empire and served as an official in Shaanxi. During the reign of the Chongzhen Emperor (r. 1627–1644), he was promoted to Minister of War and Viceroy of Suliao (薊遼; an area which included parts of present-day Shandong, Hebei and Tianjin). In 1642, he surrendered and defected to the Manchu-led Qing Empire after his defeat at the Battle of Songjin. He became one of the Qing Empire's leading Han Chinese scholar-politicians. While he was in office, he encouraged the Manchu rulers to adopt Han Chinese culture and provided advice to the Qing government on how to consolidate its control over the former territories of the fallen Ming Empire. Apart from Dorgon and Fan Wencheng (范文程), Hong Chengchou was regarded as one of the most influential politicians in the early Qing dynasty. However, he was also villainised by the Han Chinese for his defection to the Qing Empire and for his suppression of the Southern Ming dynasty (a short-lived state formed by remnants of the fallen Ming Empire).
Document 14: Jin Shuren: Jin Shuren (; 1879–1941) was a Han Chinese born in Gansu, was the warlord governor of Xinjiang, succeeding Yang Zengxin when Yang was assassinated in 1928. Jin's rule of Xinjiang for about a half-decade was characterized by strife caused by corruption, suppression and disruption. Ethnic and religious conflicts were intensified and resulted in numerous riots against his regime and his eventual downfall. Jin confiscated the local Turkic lands in order to redistribute them to the Chinese, but he gave these lands to his personal associates. The deception caused the Chinese to become the targets of hatred. Jin also favored the Han over the Turkic (such as the Uighurs) and intensified ethnic conflicts between the Uighurs and Chinese. In April 1933 Jin's White Russian troops changed allegiance, encouraged revolt in Xinjiang, ended his reign and forced him to flee to the USSR. He was succeeded by Sheng Shicai. Jin incurred the wrath of the Kuomintang (KMT) when, without approval, he signed an arms treaty with the Soviet Union. Tungan Gen. Ma Zhongying allied himself with the KMT and his troops became the 36th Division of the National Revolutionary Army (NRA). Ma was ordered to overthrow Jin. Jin was overthrown after the First Battle of Urumqi (1933) by White Russian troops under Col. Pappengut. When he returned to China in October 1933 he was arrested by the KMT, brought to trial in March 1935 and sentenced to 3-1/2 years imprisonment. However, the KMT pardoned him on 10 October 1935 and he was released from prison the next day.
Document 15: Qing dynasty in Inner Asia: The Qing dynasty in Inner Asia was the expansion of the Qing dynasty's realm in Inner Asia in the 17th and the 18th century AD, including both Inner and Outer Mongolia, Manchuria, Tibet, Qinghai and Xinjiang. Wars were fought primarily against the Northern Yuan dynasty (before 1636) and the Dzungar Khanate (1687–1758). Even before the conquest of China proper (see Qing conquest of the Ming), the Manchus had controlled Manchuria (modern Northeast China as well as Outer Manchuria) and Inner Mongolia, with the latter being previously controlled by the Mongols under Ligdan Khan. After suppressing the Revolt of the Three Feudatories and the conquest of Taiwan as well as ending the Sino-Russian border conflicts in the 1680s, the Dzungar–Qing War broken out. This eventually led to Qing conquests of Outer Mongolia, Tibet, Qinghai and Xinjiang. All of them became part of the Qing Empire and were garrisoned by Qing forces, but they were governed through several different types of administrative structure and also retained many of their existing institutions. Furthermore, they were not governed as regular provinces (until Xinjiang and Manchuria were turned into provinces in late Qing), but instead were supervised by the Lifan Yuan, a Qing government agency that oversaw the empire's frontier regions.
ground_truth: Manchukuo