No-brainer. One 4 megaton nuclear warhead will obliterate Japan, but that will breach their 'no first use' policy. Conventional war against Japan they will win hands down, but at what cost? The Chinese are obsessed about red lines, but they are not stupid. They are learning what not to do from the Ukraine war, how it has bogged down the Russians and stalled their economy.
So for those US shills agitating for war, don't even bother to pop the corn.