Background and composition
Written and arranged by Wei, "Mirror of Sanctity" incorporates elements from Chinese music with electronic rock. Wei also sampled different battle music from the game series and included them into the song. Since he was young, Wei has been an avid player of ''Xuan-Yuan Sword'' series. When Wei knew he had the opportunity to write the theme song for the game, he was extremely excited. The song is believed to be written from the perspective of Yuwen Tuo, a major character from the game. Lyrically, the song discusses that there are no heroes or villains in troubled times. In order for there to be peace, bloodshed is often inevitable.Music video
The music video was directed by Howard Kuo and Allan Shen. The music video premiered on YouTube and QQ Music on October 27, 2015. The video features a nerdy-looking Wei who is seen playing ''Xuan-Yuan Sword: Mirror of Sanctity''. He is teleported into the game and meets his doppelgänger, who is a game character. The video reveals that Wei's doppelgänger has heterochromia (two different coloured eyes), referencing Yuwen Tuo, a main character from the game. The video ends as Wei is teleported back to reality.References
{{reflist 2014 singles William Wei songs