"The recent war took a heavy toll on our people. Many were called, few returned. Nobles and peasants toiled alike as they waited for their loved ones to come home, but the war ended and they never did. Now the toiling continues, many so busy trying to make up for the loss of a pair of hands to even grieve. Of those that have time to think, many are now thinking we have thrown away lives too carelessly" Something like that, the choices are -15% taxes, -15% manpower, or +2 unrest IIRC (numbers not sure, but the effect types I remember).
Ok, so? An exaggerated, narrative event represents what? That people knew soldiers who had died during a long and very costly war? Even a tiny proportion serving in the military would have that same effect.
For example, people talk about the losses in the first world war as a bloody war where entire generations died, roughly 2% of the countries involved populations actually died.
An even deadlier war, the second world war managed up to 8% total deaths (Germany), with the completely devastated USSR managing about 14%.
The most deadly war for the British in history was the (English) Civil war, killing about 5% of the Population of Great Britain.
All these include civilian deaths from non-military factors.
In contrast, the Black death killed 20% of the Population of England, 40-50% of the population of Europe, up to 80% in some southern areas and 30-40% of the middle east. Further recurrences of plague (including during wars) killed 10-20% of areas hit. Famines tended to kill similar proportions, the Irish famines killed up to 40% of the population and the Russian famine during the time of troubles killed about 30%.
War itself is a minor cause of death (unless you are the Mongols) compared to disease and famine except in indirect forms. Its impact on the population of a country was small.
It is true that Chinese drafting was mostly local, or regional, since marching a freshly raised army up from Guangzhou for a war with Oirat would be ridiculously inefficient. However I'm pretty sure the army sizes were well north of a million during those dynasties...or do you mean only professional, career soldiers?
The Qing standing army was at its most about 700k I believe (the Banners/Green Standard) with Ming at far less, campaigns and rebellions put down involved far smaller numbers, maybe a hundred thousand at most. The Japanese invasion of Korea involved maybe 100k Chinese troops. I cant find any examples of battles or armies where China was able to muster much more than that.