How about loser leaves CBR?
Here's the thing that you don't quite seem to grasp - if you want to use a deterrent strategy like Biden is attempting, the other side needs to believe that you're willing to fight if they cross a red line. Biden's problem though is that nobody really believes that about him, which means that his threats are not credible and will not work. This means that the Chinese will continue to push further and further, safe in the knowledge that Biden won't go to war with them no matter what, until things get to a point where the situation has gotten so out of hand that Biden will have no choice BUT to fight, lest his political standing at home collapse entirely. This is basically what happened with Obama in Syria.