"Mirror of Sanctity" (Chinese: 崑崙鏡; pinyin: Kūnlún jìng) is a song recorded by Taiwanese Mandopop singer-songwriter William Wei.

The song was recorded and released in support of the mobile game, Xuan-Yuan Sword: Mirror of Sanctity.

[3] Written and arranged by Wei, "Mirror of Sanctity" incorporates elements from Chinese music with electronic rock.

[3] The video features a nerdy-looking Wei who is seen playing Xuan-Yuan Sword: Mirror of Sanctity.

The video reveals that Wei's doppelgänger has heterochromia (two different coloured eyes), referencing Yuwen Tuo, a main character from the game.