Heavenly King

Heavenly King or Tian Wang () is a Chinese title for various religious deities and divine leaders throughout history, as well as an alternate form of the term "Son of Heaven", referring to the emperor. The Chinese term for Heavenly King consists of two Chinese characters meaning "heaven/sky" and "king". The term was most notably used in its most recent sense as the title of the kings of the Taiping Heavenly Kingdom, but is also used in religious (particularly Buddhist) contexts as well.
Historical uses.
Spring and Autumn period.
In the Spring and Autumn period, the term "Heavenly King" was used to at least some extent to refer to the kings of the various Chinese states of the time. On the second page of the first text of the Spring and Autumn Annals, the term "Heavenly King" is used in the description of how the King of Lu helped pay for the funeral expenses of a duke's son who had died:
The use of "Heavenly King" in this text is analogous to the term "Son of Heaven". The use of this term reflects the idea that the King of Lu was not put into power directly by heaven's will (as Hong Xiuquan used the term), but instead that the King of Lu was of a heavenly nature by his respect of divine forces.
Sixteen Kingdoms period.
During the period of the Sixteen Kingdoms, the term "Heavenly King" was especially common to refer to the leaders of Chinese states. Some notable examples states whose kings used this term include:
Southern Song Dynasty.
During the Southern Song Dynasty, the title of Heavenly King was claimed by Yang Yao (), a rebel leader in fighting against the Song government in Hunan. Yang's career as an anti-government leader began during Zhong Xiang's Revolt in 1130, where he served as a peasant soldier under the leadership of Zhong Xiang. Yang helped occupy the Dongting Lake area in the modern-day Hunan Province with some 80,000 other soldiers before Song forces arrived. After four successive attacks by the Song against opposition forces in 1132, Yao was appointed as chief leader of the opposition while the former leader Zhong Xiang retained power in a lesser role. As leader of opposition forces, Yang proclaimed himself the "Great Sage Heavenly King" (). Yang's tenure as the Great Sage Heavenly King was short lived however, lasting only three years. Following the seventh Song offensive in 1135, rebel defenses around Dongting Lake were broken, leading to the destruction of Yang Yao's "kingdom" and his own death.
Taiping Heavenly Kingdom.
The most recent historical, as well as most well known use of the title Heavenly King is from the rule of Hong Xiuquan during the Taiping Heavenly Kingdom. Unlike previous leaders such as those during the Sixteen Kingdoms period, the rationale behind proclaiming himself a "heavenly" king is quite different. The Taiping Heavenly Kingdom's origins were deeply rooted in quasi-nationalism and religious zeal, with Hong having stated that he had received direct orders from God to become king. This reasoning behind becoming king led to Hong believing that he had been appointed to become a heavenly king, that is, a king appointed directly by heaven inside a directly appointed heavenly kingdom.
Though the title of Heavenly King in the scope of the Taiping Heavenly Kingdom would be passed down to Hong Xiuquan's son, Hong Tianguifu upon his death; Hong Tianguifu was executed shortly after becoming king as a teenager, spelling an end to the use of the title in the scope of the Taiping Heavenly Kingdom.
Religious uses.
The term Heavenly King is used even today in a limited scope within Chinese Buddhism, with a much more religious meaning than most of its uses as a title. An example of its use is within the Four Heavenly Kings. The Four Heavenly Kings are four Buddhist gods, each of whom represents one cardinal direction. They are "Vaiśravaṇa" (), "Virūḍhaka" (), "Dhṛtarāṣṭra" (), and "Virūpākṣa" ().
Uses in other countries.
Outside China, the term Heavenly King has been sometimes used as a title to refer to a ruling king or divine entity. Two countries which have done this include Korea and Vietnam, both of which are in the Chinese cultural sphere of influence, especially historically. In Korea the term is used as a title for Hwanung, the legendary founder of Gojoseon, while in Vietnam it is used to refer to the mythical folk hero Thánh Gióng.