Facebook changed its name to Meta to make the concept of meta universe popular again. The famous science fiction writer Liu Cixin once said that there are two roads in front of human beings, one outwards leading to the stars and the sea; the other inward leading to virtual reality. Stars and the sea are not beyond the reach of ordinary enterprises, while virtual reality is approaching our lives and may usher in a new industrial carnival. So how should payment be changed for the upcoming virtu...