Azure Dragon
The Azure Dragon (青龍 Qīnglóng), also known as Bluegreen Dragon or Green Dragon, also called the Blue Dragon (蒼龍 Cānglóng), is one of the Dragon Gods who represent the mount or chthonic forces of the Five Forms of the Highest Deity (五方上帝 Wǔfāng Shàngdì). He is also one of the Four Symbols of the Chinese constellations, which are the astral representations of the Wufang Shangdi. The Bluegreen Dragon represents the east and the spring season. It is also known as Seiryu in Japanese.
The Dragon is frequently referred to in media, feng shui, other cultures, and in various venues as the Green Dragon and the Avalon Dragon. His cardinal direction's epithet is "Bluegreen Dragon of the East" (東方青龍 Dōngfāng Qīnglóng or 東方蒼龍 Dōngfāng Cānglóng). His proper name as the "Dragon King of the East Sea" (東海龍王 Dōnghǎi Lóngwáng) is Ao Guang.
As the other three Symbols, there are seven "mansions", or positions, of the moon within Azure Dragon. The names and determinative stars are:
In the Romance of the Tales of the Tang (Shuo Tang Yanyi), the White Tiger's star is reincarnated as General Luo Cheng (羅成 / 罗成), who serves Li Shimin. The Azure Dragon's Star is reincarnated as General Shan Xiongxin (單雄信 / 单雄信), who serves Wang Shichong. The two generals are sworn brothers of Qin Shubao (秦叔寶 / 秦叔宝), Cheng Zhijie (程知節 / 程知节) and Yuchi Gong (尉遲恭 / 尉迟恭). After death, their souls are said to possess heroes of the Tang dynasty and Goguryeo, such as Xue Rengui (薛仁貴 / 薛仁贵) and Yeon Gaesomun (淵蓋蘇文).
...
Wikipedia