The final strategic goal for China should look like the following.
Blue Team: United States, Canada, European Union, Australia, and New Zealand. (Four China of resources)
Red Team: China, Russia (about two China), Mongolia, Kazakhstan, Uzbekistan, and Turkmenistan (Four China of resources)
I don't care how China makes it happen. China needs to pull Russia, Mongolia, Kazakhstan, Uzbekistan, and Turkmenistan into a tight alliance/federation (ie. Asian Union). If China can persuade Mongolia to voluntarily rejoin then that is a plus. Unless Mongolia rejoins China, it does not make sense for China to invest hundreds of billions of dollars in infrastructure. Mongolia is advantageous, because all of the Chinese firms will be parked on the Mongolian-Russian border. This facilitates deep business transactions.
Given the current situation, Russia seems to be moving deeper into the China camp. China should expend great effort to pull in the other four massive territories. If this is accomplished, the world will be bipolar. Four China Blue Team in equipoise with Four China Red Team. A militarily balanced world will allow China to focus on business and wealth creation.
The vital Chinese strategic goal is the lack of military coercion by the West. To accomplish this, China must play the European Union expansion game. Use their own playbook against them to level the playing field.
For Mongolia, the Chinese proposal is an American-style Federal-State government structure. If the Stans are interested, make them the same offer. Over the next ten years, China's nominal per-capita GDP will soar from $8,200 to about $20,000. The Chinese offer will look more attractive over time. All three Stans have devalued their currency recently. All three are imploding economically.
For Russia (who are too proud to enter into a Federal structure with China), the offer is an Asian version of the European Union. For Mongolia and the Stans, the Asian Union is also an attractive option until they feel ready for a Federal structure with China. In twenty years, Chinese nominal per-capita GDP should head toward $40,000. China will look more attractive to the Stans over time. People get tired of living in the Third World.