Chinese sovereign in the context of "Tianxia"

The Warring States period in Chinese history (c. 475 – 221 BC) comprises the final centuries of the Zhou dynasty (c. 1046 – 256 BC), which were characterized by warfare, bureaucratic and military reform, and political consolidation. It followed the Spring and Autumn period and concluded with the wars of conquest that saw the state of Qin annex each of the other contender states by 221 BC and found the Qin dynasty, the first imperial dynastic state in East Asian history.

While scholars have identified several different dates as marking the beginning of the Warring States period, Sima Qian's choice of 475 BC is the most often cited. The era largely corresponds to the second half of the Eastern Zhou period, where the king of Zhou formally ruled as Chinese sovereign, but had lost political power and functioned in practice as a figurehead. This dynamic served as the backdrop for the machinations of the eponymous Warring States. The label "Warring States period" derives from the Record of the Warring States, a work of history compiled during the early Han dynasty (202 BC – 220 AD).

Son of Heaven, or Tianzi (Chinese: 天子; pinyin: Tiānzǐ), was the sacred monarchial and imperial title of the Chinese sovereign. It originated with the Zhou dynasty and was founded on the political and spiritual doctrine of the Mandate of Heaven. Since the Qin dynasty, the secular imperial title of the Son of Heaven was "Huangdi".

The title, "Son of Heaven", was subsequently adopted by other Sinospheric monarchs to justify their rule. The name Celestial Empire (or "Heavenly Dynasty") was also used in reference to the status of the Chinese emperor as the Son of Heaven in the Sinosphere.

The Shun dynasty, officially the Great Shun, also known as Li Shun, was a short-lived dynasty of China that existed during the Ming–Qing transition. The dynasty was founded in Xi'an on 8 February 1644, the first day of the lunar year, by Li Zicheng, the leader of a large peasant rebellion, by proclaiming himself "emperor" (皇帝) instead of the title "king" (王) before founding the dynasty.

The capture of Beijing by the Shun forces in April 1644 marked the end of the Ming dynasty, but Li Zicheng failed to solidify his political and military control, and in late May 1644 he was defeated at the Battle of Shanhai Pass by the joint forces of Ming general Wu Sangui (who had defected to the Qing dynasty), with Manchu prince Dorgon. When he fled back to Beijing in early June, Li finally proclaimed himself the Yongchang Emperor of the Great Shun and left the capital the next day after setting the palace ablaze and ransacking the government offices. He may have intended to resume his Imperial claims later on by proclaiming his accession in the Forbidden City. After the death of the emperor, Shun remnants joined with the Southern Ming in Nanjing, while continuing to refer to Li as their "deceased emperor". The Shun dynasty weakened dramatically after the death of Li Zicheng in 1645. The successors, his brother Li Zijing and nephew Li Guo, could not fight back and the dynasty ended in 1649 when Li Guo died in Nanning, Guangxi.

China was a monarchy from prehistoric times up to 1912, when a republic was established. The succession of legendary monarchs of China were non-hereditary. Dynastic rule began c. 2070 BC when Yu the Great established the Xia dynasty, and monarchy lasted until 1912 when dynastic rule collapsed together with the monarchical government. Various attempts at preserving and restoring the Chinese monarchy occurred during and following the 1911 Revolution, but these regimes were short-lived and lacked widespread recognition.

The monarchy of China took the form of absolute monarchy during most of its existence, even though the actual power of the ruler varied depending on his/her ability to consolidate the rule and various other factors. On 3 November 1911, the Qing dynasty issued the constitutional Nineteen Creeds which limited the power of the emperor, marking the official transition to a constitutional monarchy. However, after only 3 months, the monarchy was abolished.

Ying Ziying, also known as Ziying, King of Qin (Chinese: 秦王子嬰; pinyin: Qín-wáng Zǐyīng, died c. January 206 BC), was the third and last ruler of the Qin dynasty of China. He ruled over a fragmented Qin Empire for 46 days, from mid-October to early December 207 BC. Unlike his predecessor, he ruled as a king instead of emperor. He is referred to in some sources with the posthumous name Emperor Shang of Qin (秦殤帝) although the Qin dynasty had abolished the tradition of according posthumous names to deceased monarchs.

The Chinese monarchs were the rulers of China during Ancient and Imperial periods. The earliest rulers in traditional Chinese historiography are of mythological origin, and followed by the Xia dynasty of highly uncertain and contested historicity. During the subsequent Shang (c. 1600–1046 BCE) and Zhou (1046–256 BCE) dynasties, rulers were referred to as Wang 王, meaning king. China was fully united for the first time by Qin Shi Huang (r. 259–210 BCE), who established the first Imperial dynasty, adopting the title Huangdi (皇帝), meaning Emperor, which remained in use until the Imperial system's fall in 1912.

At no point during Ancient or Imperial China was there a formalized means to confer legitimate succession between rulers. From the Zhou dynasty onwards, monarchs justified their reigns by claiming the Mandate of Heaven (天命; Tiānmìng). The mandate held that a ruler and their successors had permission from the heavens to rule as long as they did so effectively. It also declared a ruler the Son of Heaven (天子; Tiānzǐ), giving them the right to rule "all under heaven" (天下; Tiānxià). Given the Mandate's subjective nature, rulers also utilized a variety of methods to retain support and justify their accession. This ranged from military enforcement, political patronage, establishing peace and solidity, institutional reform, and historical revisionism to legitimize the dissolution of previous dynasties and their own succession. For most of Imperial China, the wuxing (五行; "Five Elements") philosophical scheme was also central to justify dynastic succession.