In fact, the original meaning of emptiness is that there are one or two ground support bye in a certain ten-day period, that is to say, the time has not yet arrived, but it has a temporary bye, so although the word seems to exist, it can't really play a role.
When the empty words in the eight characters appear in the Universiade, they cannot be filled in, or they can be regarded as empty words and ignored for the time being.