1. China has recognized the sovereignty of Mongolia. One sovereign country does not take over another sovereign country.It is better to take Mongolia part of China map, I wonder why China can't do something?
2. Mongolia is under Russian protection.
3. The historical context is that Mongols invade China, not the other way around.
Surrender to the US, of course.Let's say the U.S. and China are at war and the U.S. Navy cuts off Middle Eastern oil. What is China's next move?