The past few decades have witnessed a great endeavor in the search for quantum spin liquids(QSLs).[1-8]This phase of matter,which features long-ranged quantum entanglement and fractional-ized spin excitations,is beyond Landau's symmetry-breaking paradigm and is naturally associated with the celebrated idea of resonating valence bond(RVB).[1]What is more,high-temperature supercon-ductivity was proposed to emerge from doping such an RVB state.[2,9]