From what I have seen from the CCP, I am not sure how capable of reason or sense they are. Plus, it's not as if they have kind of a meaningful choice. Their position is desperate and drastic. I had made a post about this in another thread, I'll post it here again for you:
"I think why China is doing this is fairly simple.
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The median age of China has just recently surpassed the US and it's rising fast. While their economy continues to grow, the CCP knows that their growth will slow down eventually - especially considering that salaries are rising fast and China is losing its status as workbench of the world.
Meanwhile growth in many Asian countries, but most importantly India, is accelerating at an incredible pace.The median age in India is 10 years below that of China. We are just cashing in on our youth dividend.
It's not wholly accurate but put these factors together and you get a situation eerily similar to the Concert of Europe just before WW1. China (the then Germany) is well on its way to eclipse the current hegemon USA (the then Great Britain), but at the same time fears to be overtaken by India (the then Russia), another rising power with much potential.
This instills a fear of urgency in the CCP to act when their relative power peaks. This window of opportunity will be around 2030 to 2040, possibly even before then, and it's going to be extremely dangerous. No doubt their thinking is to occupy certain Indian territories that are rich in much-needed resources and more importantly will provide manpower and human labor in the form of civilians that they capture.
This, they believe, will reinject energy into China and prevent them from collapsing. Like I said, alarming and will result in a bloodbath. Because it's not a question of "winning" in their minds, they believe it's a question of their survival."