This is diplomatic flexing, and this is part of the intimidation game. It would be foolish for China to go into this war, they have very little to gain in case

This is diplomatic flexing, and this is part of the intimidation game. It would be foolish for China to go into this war, they have very little to gain in case of success and a lot to lose. Also their probability of success is quite small. They have a large army and they have a lot of equipment and weapons. But war is something special, you can't really train soldiers outside of a real conflict. They are newbs.