Yellow color was worshiped in ancient China, and it was often deemed to be symbol of regality. There was an old saying in ancient China, When dragons fight, the blood they bled was yellow, and also, dragons were regarded as symbol of emperors.
The Chinese dragon symbolizes the sovereignty of emperors, and everything related to it was exclusively for emperors in the Chinese feudal society. The ancient emperors called their sons'seeds of dragons', their robes were'dragon robes', and their palace was a'dragon palace'. The imperial throne was called the Dragon Throne.
The Emperor refers to any sovereign of Imperial China reigning between the founding of Qin Dynasty of China, united by the King of Qin in 221 BC, until the abdication of Puyi in 1912 following the Xinhai Revolution. When referred to as the "Son of Heaven", a title that predates the Qin unification, the Emperor was recognized as the ruler of "All under heaven" .
Manchu, also called Man, people who lived for many centuries mainly in Manchuria (now Northeast) and adjacent areas of China and who in the 17th century conquered China, built the Qing dynasty and ruled for more than 250 years, from 1644 to 1911.