Excellent Mirror Depicting an Alchemical/Magical Scene

An excellent mirror done in high relief and crisply cast, with winged snake-like beings, birds, dragons and composite spirit personages all around a high central nub. Encircled by an inscription in Chinese characters, an outer rim of stylized running foliage.
Sui-era. China.
Diameter: 22.5 cm.
Thickness: 0.6 cm.
CM025