Given the weakness and corruption of late Qing dynasty China, they were hardly expanding anywhere. In fact, China endured over a century of humiliation by foreign powers, including Russia, France, Germany, the US, and Japan, as they carved up "spheres of influence" and took Chinese land (Hong Kong by Britain, Jiaotong Peninsula by Germans, Taiwan by Japanese in the 1890s). Japan and Russia fought for control in Manchuria; the Japanese won that war, and had de-facto control of Manchuria until they allowed it to declare "independence", as a Japanese puppet state.
While claims of Chinese *Communist* expansion into Tibet and consolidation of power in Western China is another issue entirely, the idea of Chinese expansion from 1800-1949 is simply propagandist bullshit. Through the Opium Wars, Taiping Rebellion and other civil strife, to the Nationalist/Communist Civil War, China couldn't control its own territory, much less expand.
We were carving China up, hence calling it the "sick man of the East". Claiming pre-1945 China was expanding or looking for "Lebensraum" is simply rediculous.
Claiming post-Communist China has imperial ambitions is another argument entirely, and perhaps one worth discussing. But trying to use "Manchukuo" as an example, or saying the China was a dominant empire (it was an empire in decline, corrupt and feeble) discredits much of the rest of your argument. "The secret and reclusive Middle Kingdom"? It was the Republic of China at that point, and currently involved in both civil war and trying to repel invasion from the Japanese.
For the rest, Modern Chinese leaders do not view their industrial usage of the territories as expansion, but as using territories that rightfully belong to them, just like the US drilling for oil in Alaska (which we purchased from Russia in the mid 1800s).
Using adjectives like âoesinister policy" and "consolidate de facto Chinese rule for an eternity" does not help your case, either. Makes you sound paranoid at best. I am not even Chinese; but the historical inaccuracies and misrepresentations in your post would make anyone weep.