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Crown Prince

皇太子 · Crown Prince — The Sole Heir to the Empire

The Crown Prince is the eldest son or legitimate heir formally designated as successor of an emperor or king. Not simply the eldest child, only those officially recognized as next monarch through formal investiture rites become crown prince. In East Asia (Korea, China, Japan), they were called 'Donggung' (East Palace) — given separate residences in the east of the imperial palace for education and governance training as future emperor. The crown prince is not merely a successor but a living symbol of power, simultaneously the most dangerous position — constant target of brothers, concubines, and maternal relatives plotting for the throne. Historically, many tragic cases exist of emperors themselves doubting and deposing or executing their own crown princes (Han Wudi's Crown Prince Ju in China, Joseon Yeongjo's Crown Prince Sado). Early imperial deaths sometimes led to youthful enthronements, while delayed enthronements caused conflicts with the emperor. England uses 'Prince of Wales,' Japan uses '皇太子' (Kōtaishi).

Origin

An institution developed in monarchies across both East and West to clarify the succession. China's Crown Prince (太子) and Europe's Crown Prince share the same fundamental concept.

Features

Holds the rank immediately below the emperor and receives highest honors in imperial ceremonies
Nominal supreme commander or effective commander-in-chief of the imperial armies
Independently administers the Crown Prince's Palace with a separate staff
Power struggles with siblings and nobles over the succession are a daily reality

Usage

In fantasy, the crown prince frequently appears as the protagonist's companion, a hidden adversary, or a target in need of rescue.