Quantum mechanics is a pillar of modern science and technology, and has benefited human society for a century. The wave function, also known as the quantum state, is the description of a quantum object and plays a central role in quantum mechanics. Nonetheless, the nature of the wave function is still debated. So far, there have been several interpretations of the wave function, including the Copenhagen interpretation, the De Broglie’s pilot wave interpretation, and the many-word interpretation.