Liquid and glass are two closely associated fundamental states of matter. The existence of two or more structurally different but chemically identical liquids or glasses, referring to as liquid polymorphism or glass polymorphism, has been attracting extensive and enduring research interest over decades, which, however, remains an intriguing field but full of intense debates. In this talk, using in situ high-temperature high-pressure synchrotron x-ray diffraction technique, two distinct stable liquids and three distinct glasses via high-pressure liquid quenching and the following decompression are identified in prototype multi-component metallic glass-forming alloys. Comprehensive structural, compositional, and properties diagnostic characterizations confirm their homogeneous amorphous nature of the recovered glasses. The entire process are monitored by in situ synchrotron x-ray diffraction, which provide explicit evidence for the general existence of polyamorphism in liquid and glasses in multicomponent alloys, more importantly, establishes a long-sought direct linkage between them.