Chinese mythology
The Chinese dragon is one of the most important mythical creatures in Chinese mythology, considered to be the most powerful and divine creature and the controller of all waters who could create clouds with their breath. The dragon symbolized great power and was very supportive of heroes and gods. The conventional dragon has a certain description, however there are other dragons or dragon-like beings that vary from this description. For example, the Chi of mythology lacks horns. Dragons often chase or play with a mystical or flaming pearl. A dragon-fenghuang pairing is a common motif in art, the fenghuang often being called a "phoenix".
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.