China is a total joke:
1 - Their tanks are totally worthless... how are they going to get them anywhere? And then what? We have anti-tank missiles that can be launched from drones.
2 - They have 1... ONE air craft carrier, and it was built off an old 1970s Russian hull. They're building another one right now, and it's basically built off the exact same design. Both are "ski-jump" carriers, and both are diesel. The United States (for example) has 12 carriers, ALL of which are nuclear powered, a few of which are only a couple of years old. On top of that, we have three more carriers that were recently decommissioned that we could recommission within a couple of weeks. We have so many God-damned air craft carriers that if Trump farts... we may end up with another carrier. We have over 450+ huge ships in the US NAVY, that includes over 50 submarines, most of which are nuclear powered, with another 15 of them that carry nuclear weapons on them. Destroyers ??? We have more than 70. If we sent our entire fleet to china, we could surround the entire country of Hong Kong with a wall of awesomeness.
3 - Planes... their Air Force is a ****ing joke... and I use those explicit words on purpose. The bulk of their air fleet is made up outright of US, Russian, and Canadian planes that they've converted. All of their own designs are based almost entirely on stolen US and reworked Russian designs. At best, their planes are only AS good as some of ours, at worse, their best planes are far worse than the US counterparts that they were stolen from 10+ years ago.
China is a complete ****ing joke of a military... and if the United States went head-to-head with China, they'd lose nearly every battle from sheer might alone.
China's best defense in their ambitions, is that the United States and other countries likely wouldn't do **** to fight them off, and that's the real problem. China has been allowed to do whatever they want for as long as they want, without any repercussions.