Long Yi immediately found the explanation on the tablet.
Space-time stability, refers to whether the current space-time is intact. In other words, whether the space is closed or not. A standard space should be a completely closed space. But if there are space-time scars, it brought by existence, then the space will be defined as not being closed. This space was originally Long Yi's private space, there must have been an entrance and exit, so it being unenclosed is natural.
So what about the next entry?