Is it true that China is the most powerful country in our contemporary war?

People seem to make the mistake that the United States is owned by China. But in truth, the employer is not owned by the employee. We are one of the biggest people who give China money, if we say jump they need to jump. If they went against us and risk losing there greatest money output they risk there economy crashing. That's why the recent upped tensions in asia have been mediated by the United States.