Xi is waiting to take back all the land on the asian continent that was once theirs
Meh...
I doubt it.
China is a lover, not a fighter. Their last war was in 1979, against the Communist Vietnamese. The latter had toppled China's only puppet at the time (Cambodia's Khmer Rouge - a regime worse than Hitler's), and China felt it had to punish the Vietnamese. Despite overwhelming superiority in arms and men, China ended up getting its ass kicked by the battle hardened Vietnamese.
Here's a wider brief of China's experience in foreign relations:
1) 13th century - the Mongols, a people with 1/200th of China's population - wreck the Song Empire. For a good century and a half, the Chinese become second class citizens in their own country.
2) In the 14th century, the Han Chinese had seemingly had enough, and kick out the Mongols. Power transitions back to the ethnically Chinese Ming dynasty. It doesn't last very long, however, as in the 1600s the Chinese are again destroyed by a neighboring minnow - this time the Manchus. Just like the Mongols, the Manchus of the Qing Dynasty spend the next couple centuries humiliating the Chinese, by forcing on them weird hairstyles, and lots of other funny things.
3) China enters the 20th century, still under the rule of the foreign Manchus (a Tungussic speaking people, basically southern Eskimos). It's weakened by being plundered by the Western Great Powers, but still standing. However, it is soon plunged into a decades long de facto civil war. In the process, they also get absolutely smashed by the Japanese.
Long story short - it's been a very long time since China has successfully conquered anything, with the exception of the barren alpine plateau that is Tibet.
The Chinese do not make good soldiers. They are good farmers, good craftsmen, good thinkers, but not good fighters.
Meanwhile, the modern popular Chinese nickname for Russia is 战斗民族, which roughly means "Fighting Nation". They think we ride bears, smash vodka bottles over our heads, and are generally crazy.