Question: Who was  the last emperor or last "Son of Heaven" of China?

Context paragraphs:
Jia Yinghua: Jia Yinghua () was a Chinese writer and researcher who focused on the late Qing Dynasty.  He served as Vice President of the Biography Society of China, commissioner of National Commission of the Chinese Writers’ Association, President of China's Electrical Power Writers' Association.  Representative works of his include "The Later Half of the Last Emperor's Life" (), "The Last Eunuch of China: The Life of Sun Yaoting]]" (), "The Last Emperor’s Brother: The Life of Pujie" ().  The Japanese version of The Later Half of the Last Emperor's Life is a bestseller in Japan, attracting great attention and garnering enormous popularity.  According to authoritative media and press organizations in more than 100 countries and regions, including China, the United Kingdom, the United States, France, Japan, Hong Kong, Macao, and Taiwan this book is a successful continuation of "From Emperor to Citizen" (): The Autobiography of Aisin-Gioro Pu Yi () written by Pu Yi himself.  The Chinese version of "The Later Half of the Last Emperor’s Life" is always a domestic bestseller and has been published nine times in total, and also won the Gold Key Award in the 5th Chinese Books Fair.  His calligraphic works were also incorporated into "First Exhibition of Chinese Celebrities’ Calligraphic Works", "Exhibition of Contemporary Celebrities’ Paintings and Calligraphies", etc.

Murong Xi: Murong Xi (; 385–407), courtesy name Daowen (道文), formally Emperor Zhaowen of (Later) Yan ((後)燕昭文帝), was an emperor of the Xianbei state Later Yan.  He was one of the youngest sons of Murong Chui (Emperor Wucheng), and after the death of his nephew Murong Sheng (Emperor Zhaowu) became emperor due to his affair with Murong Sheng's mother, Empress Dowager Ding.  He was regarded as a cruel and capricious ruler, who acted at the whims of himself and his wife, Empress Fu Xunying, greatly damaging the Later Yan state.  After Empress Fu died in 407, he left the capital Longcheng (龍城, in modern Jinzhou, Liaoning) to bury her, and the soldiers in Longcheng took this chance to rebel and replace him with Murong Bao's adopted son Murong Yun (Emperor Huiyi), and Murong Xi himself was captured and killed.  (Because Murong Yun was an adopted son who later changed his name back to Gao Yun, some historians treat Murong Xi as the last emperor of Later Yan and Gao Yun as the first emperor of Northern Yan, while others treat Gao Yun as the last emperor of Later Yan and his successor Feng Ba as the first emperor of Northern Yan.)

Emperor of China: The Emperor of China () was the sovereign of Imperial China reigning between the founding of the Qin dynasty that unified China in 221 BC, until the abdication of Puyi in 1912 following the Xinhai Revolution and the establishment of the Republic of China.  The emperor was also referred to as the "Son of Heaven" (), a title that predates the Qin unification and recognized as the ruler of "all under heaven" (i.e., the whole world).  In practice not every Emperor held supreme power in China, although this was usually the case.

Zhu Youzhen: Zhu Zhen (朱瑱) (20 October 888 – 18 November 923), often referred to in traditional histories as Emperor Mo of Later Liang (後梁末帝, "last emperor") and sometimes by his princely title Prince of Jun (均王), né Zhu Youzhen (朱友貞), known as Zhu Huang (朱鍠) from 913 to 915, was the emperor of the Chinese Five Dynasties and Ten Kingdoms period state Later Liang from 913 to 923.  He was the third and last emperor of Later Liang, the first of the Five Dynasties.  He ordered his general Huangfu Lin (皇甫麟) to kill him in 923 when Emperor Zhuangzong of Later Tang (Li Cunxu), the emperor of Later Liang's enemy Later Tang to the north, was on the cusp of capturing the Later Liang capital Daliang.  His death marked the end of Later Liang, which was to be the longest among the Five Dynasties.  Despite his ten-year reign being the longest of all the Five Dynasties emperors (if one does not count Li Cunxu's reign as the Prince of Jin prior to taking imperial title) sources on his era are relatively scarce, as many Later Liang records were destroyed following the Later Tang conquest of Later Liang (as Later Tang viewed Later Liang as an illegitimate regime).

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).

Li Congke: Li Congke () (11 February 885 – 11 January 937), also known posthumously as Emperor Mo of Later Tang (後唐末帝, "last emperor of Later Tang"), Emperor Fei of Later Tang (後唐廢帝, "deposed emperor of Later Tang"), Wang Congke (王從珂) (particularly during succeeding Later Jin, which did not recognize him as a legitimate Later Tang emperor), or Prince of Lu (潞王, a title Li Congke carried prior to his reign), nickname Ershisan (二十三, "23") or, in short, Asan (阿三), was the last emperor of the Later Tang - the second of the Five Dynasties following the fall of the Tang Dynasty.  He was an adoptive son of Li Siyuan (Emperor Mingzong) and took the throne after overthrowing Emperor Mingzong's biological son Emperor Min of Later Tang (Li Conghou).  He was later himself overthrown by his brother-in-law Shi Jingtang, who was supported by Khitan troops (and whose Later Jin succeeded his).  When the combined Later Jin and Khitan forces defeated Later Tang forces, Li Congke and his family members, as well as the guards most loyal to him, ascended a tower and set it on fire, dying in the fire.

The Last Emperor: The Last Emperor (Italian: "L'ultimo imperatore" ) is a 1987 British-Italian epic biographical film about the life of Puyi, the last Emperor of China, whose autobiography was the basis for the screenplay written by Mark Peploe and Bernardo Bertolucci.  Independently produced by Jeremy Thomas, it was directed by Bertolucci and released in 1987 by Columbia Pictures.  Puyi's life is depicted from his ascent to the throne as a small boy to his imprisonment and political rehabilitation by the Communist Party of China.

Emperor Bing of Song: Zhao Bing (12 February 1272 – 19 March 1279), also known as Emperor Bing of Song, was the 18th and last emperor of the Song dynasty in China.  He was also the ninth and last emperor of the Southern Song dynasty.  He reigned for about 313 days from 1278 to 1279 until his death.

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.

Emperor Mozhu of Western Xia: Emperor Mozhu ("last ruler") or Emperor Modi ("last emperor") of Western Xia was the last emperor of the Tangut-founded Western Xia dynasty and reigned from 1226 to 1227.  His personal name was Lǐ Xiàn 李睍.  His rule saw the destruction of the Western Xia as the Mongol forces under Genghis Khan overran and conquered it following the defiance and rebellion of earlier emperors.

Supporting paragraphs: Emperor of China Puyi
Answer: Puyi