Cheng Guan (澄观) was a prominent Chinese Buddhist monk and scholar of the Tang Dynasty, known for his comprehensive commentary on the Flower Garland Sutra (Avatamsaka Sutra), titled "The Exposition of the Garland Sutra's Meaning" (大方广佛华严经疏). Jing Yuan (净源) was a Song Dynasty monk who re-engraved Cheng Guan's work.