Zhenjin

Zhenjin ( , ; 1243 – 1285 or January 5, 1286), also rendered as Jingim, Chinkim, or Chingkim (), was the son of Kublai Khan and grandson of Tolui. 
Life.
He was born as second son to Kublai Khan and Chabi Khatun. The Chinese Zen monk Haiyun gave him the name Zhenjin ("True Gold") when he was born in 1243. He was created Prince of Yan (燕王), became the head of the Central Secretariat ("Zhongshu Sheng") by his father in 1262, and was designated as the Crown Prince (皇太子) of the Yuan dynasty by Kublai Khan in 1273. 
He was known as a strong supporter of Confucianism, having been tutored by Chinese scholars as (1203–1280), Dou Mo (1196-1280), Liu Bingzhong (1216-1274) and Wang Xun. Among others, he was noted to have studied "Classic of Poetry" and "Classic of Filial Piety". After death of Zhenjin's rival Ahmad Fanakati (according to Rashidaddin, as a result of plot by Zhenjin), a Confucian-trained official in the South even proposed Kublai to abdicate in favor of Zhenjin in 1285, as a result Kublai was furious. He was also known to be a friend of Drogön Chögyal Phagpa, who wrote the famous treatise "Explanation of the knowable" for Zhenjin.
According to the "History of Yuan", he died of alcoholism on 5 January 1286, eight years before his father Kublai Khan. However, it may not have been as simple as merely drinking too much. It also stated that shortly before his death, some ministers of the court wanted to propose that Kublai Khan abdicate his throne to Prince Zhenjin on account of old age and because Zhenjin was highly respected throughout the empire. However, Zhenjin tried to prevent this from happening. Unfortunately, Kublai Khan found out anyway and was furious, which terrified Zhenjin and may have led him to overdrink. Distressed by his death, Kublai Khan made Zhenjin's son Temür the new Crown Prince. He was posthumously renamed as Taizi Mingxiao by Kublai on 25 February 1293. Temür gave him posthumous name Emperor Wenhui Mingxiao (文惠明孝皇帝) and temple name Yuzong () on 3 June 1294.
Family.
He had a senior wife and a concubine: