What imagery is suggested in the Chinese characters of the dynasties new name?
Nurhaci declared himself the "Bright Khan" of the Later Jin (lit. "gold") state in honor both of the 12–13th century Jurchen Jin dynasty and of his Aisin Gioro clan (Aisin being Manchu for the Chinese 金 (jīn, "gold")).  His son Hong Taiji renamed the dynasty Great Qing in 1636. There are competing explanations on the meaning of Qīng (lit. "clear" or "pure"). The name may have been selected in reaction to the name of the Ming dynasty (明), which consists of the Chinese characters for "sun" (日) and "moon" (月), both associated with the fire element of the Chinese zodiacal system. The character Qīng (清) is composed of "water" (氵) and "azure" (青), both associated with the water element. This association would justify the Qing conquest as defeat of fire by water. The water imagery of the new name may also have had Buddhist overtones of perspicacity and enlightenment and connections with the Bodhisattva Manjusri. The Manchu name daicing, which sounds like a phonetic rendering of Dà Qīng or Dai Ching, may in fact have been derived from a Mongolian word that means "warrior". Daicing gurun may therefore have meant "warrior state", a pun that was only intelligible to Manchu and Mongol people. In the later part of the dynasty, however, even the Manchus themselves had forgotten this possible meaning.