The question is, is President Xi willing to risk military conflict to enforce whatever new lines he draws on the map? I don't think he is. As we saw the air zone China drew that overlapped Korea, Japan and Taiwan, it was promptly ignored by all countries and when the US stealth bombers were flying China was silent . An actual combat that results in Chinese loss would be detrimental to the continuity of Xi's party and…
They are considered the 3rd most powerful military.
What is the risk?