Well I didn’t say right now. What I argued for AFTER Putin leaves office amid a Russia weakened from the Ukraine War. Nor did I argue for taking the Russian Far East/Outer Manchuria. But I did argue for taking back Outer Mongolia and parts of Kazakhstan that used to belong to the Qing before the Tsarist conquest of Ili if neither contemporary Russia nor the US were in direct positions to stop China. What I am suggesting is an opportunistic expansion in the future (again, after Putin leaves and Sino-Russian Relations deteriorates FIRST) similar to the Russian invasion of Crimea in 2014.
Those territories may not be suitable for agriculture, but they do have mines, oil, gas, and rare earth (especially Mongolia). Water source is another importance, giving China new opportunities to divert water from those massive fresh lakes (or desalinisation for saline lakes) all the way toward the highly populated Yellow River Basin. Such massive diversion projects could sustain jobs for China’s massive infrastructure industrial complex, as similar technology used to high-speed rail bridges and tunnels could be used to build massive aqueducts.
And yes we are talking about neo-imperialism here, but who isn’t?