population of Manchuria :
"
Russia’s most exposed subdivision to the Chinese border is the Amur oblast, with a population of 830,103 people, according to the
official data of the 2010 national census. The second most exposed region is Primorsky Krai, with approximately 1,956,497 people, mostly concentrated around Vladivostok. Another Russian federal subject area that has a border with China is the Jewish Autonomous Oblast, with a population of 176,558 people. The last of the federal administrative areas is Khabarovsk Krai, with a population of 1,343,869 people. So roughly, the regions that neighbor China are home to 4.3 million Russians.
So
4.3 million Russians facing around 109 million Chinese
"
+ many the locals historicity and today are anti - Moscow separatists
Siberian Regionalism a Growing Threat to Moscow - Jamestown
https://jamestown.org › program › siberian-regionalism...
4 Aug 2020 — The
protests in
Khabarovsk and other Russian cities in Siberia and the ... authorities uncovered an alleged “conspiracy of Siberian
separatists.
my men in action )
en.wikipedia.org