The Unparalleled Invasion by Jack London (American, 1910)

Summary:
This story was written in 1910 and describes the events of a hypothetical future in 1976. China becomes one of the most powerful nations in the world. It goes to war with other nations, like Japan, and it begins expanding throughout the territories of Korea, Formosa and Manchuria, for example. China's population begins expanding and the people begin migrating to countries outside of Asia, which starts causing a clash in ideology. As a result the West is afraid of being overrun by China, that might be provoked by another war, as it happened before, so they decide to stop its expansion. Because of this, the United States and other countries in the West decide to launch a biological war against China, which destroys almost the entirety of its population, and the territory is invaded by American and European troops, and China is finally overrun and colonized. The nations of the world then celebrate a time of peace and illumination, and the nations of the world swear not to use again the same techniques to colonize another territory as they did with China.

Another summary:
The story is set in a hypothetical post-war world and narrated in the same way as a historical event. It starts with a war that took place in 1904 between Japan and Russia, this war ended in 1904 with the victory of the Japanese empire, but Japan started to have expansionist ambitions and turned his eyes on his brother country.
 The industrialised China at the moment had a population of 400,000,000 who were good workers, and with the right education, they could have become useful soldiers, and also had a considerable amount of coal and iron.
 Japan and China started to establish a good relationship, it seemed that the Japanese plan would be a success because even the Japanese emissaries where in China’s council. China starts to get stronger and stronger and to have more industrial development because of the Japanese hegemony.
 Unexpectedly, China breaks every relationship with Japan. Naturally Japan declares the war on China, but, at the time, China was so big and powerful that Japan could not do much against that.
 China starts to be seen as a threat to the other world's powers.
 China was so big that it could easily aspire to expand by going to war. but they did not, at least at first, they decided to only develop their industries instead of their army.
 The population of China was of about 500,000,000 souls, more or less half of the entire world population.
 This increased immigration from China and this was a problem for France, which finally decided to declare war on China. France did not have big problems invading the peaceful of China at first, but this action turned China into a more hostile nation. So that, with his 550,000,000 souls, they easily reversed the situation.
 France lost, and China became a military country that started to expand in every direction. At that time, China’s population was half of the entire world's population.
 This started the China-World War. China was pretty confident about winning, and it was not in vain. It was 100% sustainable, and had at least a 100,000 birth rate.
 The other world powers did not invade China, instead they opted for using biological weapons. 
 They drowned China in an inferno of plagues that came with hunger, violence, horror and pain that killed millions of people. With this event, the China World War finally ended in 1976.

Another summary:
The Unparalleled Invasion narrates the conflict between China and a group of the western, mostly european, countries. China is first introduced as a colony being led by Japan into an “occidental” mindset. But China’s population grows so quickly that the nation becomes independent and unconquerable despite the efforts of the western countries to defeat it. Countries like France or the United States are "devoured" by the overwhelming Chinese "mouth" and the colonizing countries fear the destabilization of their colonies elsewhere in Asia. China is proud and "laughs" at them. The culmination of the tension ocurrs when the west forms an alliance and start a biological warfare that ends up destroying almost the entire Chinese population due to various infectious diseases. Once China is taken out of the picture, it begins an era of rapid technological and economic development for western nations, all of whom promise never to use the same weapon that they used against the Chinese against one another.

World view: The world portrayed in the story is an hypothetical society which seems to be worse than the one the author lives in.
Future projections: It’s a fearful prediction of the possible outcomes of today’s actions. Thus, it warns us against the terrible disasters (e.g. overpopulation, war, climate change) which would follow if there is no change in direction.
Ideology:  It’s either the polarization of an ideology or an absurdist exaggeration of unfortunate or odd circumstances
Characters, plot and writing style: The story features a rebellion against the adverse circumstances (revolutionaries may exploit newer technologies for these ends).
Classification: Non-dystopia