Chinese culture
Chinese dragons are legendary creatures in Chinese mythology, Chinese folklore, and East Asian culture at large. Chinese dragons have many animal-like forms such as turtles and fish, but are most commonly depicted as snake-like with four legs. They traditionally symbolize potent and auspicious powers, particularly control over water, rainfall, typhoons, and floods. The dragon is also a symbol of power, strength, and good luck for people who are worthy of it in East Asian culture. During the days of Imperial China, the Emperor of China usually used the dragon as a symbol of his imperial power and strength. They are also the symbol and representative for the Son of Heaven, the Mandate of Heaven, the Celestial Empire and the Chinese Tributary System during the history of China.
Horse in Chinese mythology
One of the main characters in the classic novel "Journey to the West" mostly appears in the form of a white horse, but is really a converted dragon (Yu (1980, 1977)): "passim") Yulong, the third son of a Dragon King (Ao Run, of the West Sea): in order to redeem himself from his past unfilial sins, Boddhisatva Guan Yin gracefully allows him to serve as a mount for the monk Xuanzang during his mission to fetch scriptures from "the West". 
Monkey (Sun Wukong) is employed in Heaven as a supervisor of the celestial stables. He also battles Horse-face guardians, during his epic harrowing of hell. Throughout the novel, the dragon-horse serves a role as part of a fairly elaborate metaphor (or conceit), in which the white horse symbolizes mental will, or mindful willpower.