Chinese indeed conquered many others and Chinese history is indeed filled with violence. China started out as some bronze age tribes along the Yellow River. Chinese originally controlled maybe a few villages along a small stretch of land. How did China expand to become an empire? Sometimes by people peacefully joining, but most often by conquest. The difference was, once conquered, there was no need for further bloodshed unless they continued resistance.You do not have a long history of being persecutors because everything needed to build a large and prosperous empire was already located within China itself, you are right. However, the corollary of this, as I am sure you know, is that there have been several dozen extraordinarily violent and brutal civil wars over control of these resources. You were consistently winners because the wars you fought were between different factions of Chinese themselves. There is nothing wrong with this, but pretending it did not happen is dishonest.
And that is not to say that Chinese states have never engaged in violent repression or conquest of others. The genocide of the Dzungar people by the Qing is a prime example, as is the many repeated invasions of northern Vietnam by dynasties stretching back to the Han. The Vietnamese certainly remember this.
And when it comes to the current (and hopefully permanent) Chinese state, its ability to industrialize was wholly dependent on the mass killing of the landlord class that occurred in the immediate 2 years of so after the KMT were expulsed. This involved the death of well over a million people, and very often the killing of entire family networks rather than just the individual landlords themselves. But without this, it would never have been possible to create an industrial base on which development could occur, because all of the food that needed to be devoted to urban workers would have been hoarded by landlords.
Before the 20th century we were only victimized by Xiongnu, Mongols and Manchus. We conquered the Xiongnu twice, vassalized 1st time then destroyed the 2nd. Ming Empire conquered and vassalized the Mongols. We indeed lost to Manchu, but they lost in the end and became Chinese themselves. What do we have to prove? Did anyone get revenge on the Manchu royal family? No, Puyi lived peacefully unlike King Louis XVI or Tsar Nicholas.
was not an example of unnecessary revenge for the sake of proving a point. Armed landlords conducted war crimes under the KMT. They were not innocent victims. Many landlord families were part of capitalist kin networks that owned large plots of land - and used force of arms to enforce their rule on that land. It is impossible to prove individual guilt in such circumstances because everyone is complicit in crime.
During the Chinese Civil War, the established the Homecoming Legion (: 還鄉團; : Huán xiāng tuán; also translated as 'Return-to-the-Village Corps'), which was composed of landlords who sought the return of their redistributed land and property from peasants and CCP , and the release of forcibly conscripted peasants and communist prisoners of war. These militia accompanied KMT forces advancing into the countryside even before the late 1946 formal outbreak of the civil war. On the pretext of pacifying the countryside, the Homecoming Legion killed civilians indiscriminately and routinely blackmailed, raped, and extorted civilians.
The Homecoming Legion conducted a guerrilla warfare campaign against CCP forces and purported collaborators up until the end of the civil war in 1949. Many landlords used violence to oppose land reform even after the defeat of the Kuomintang in 1949. Some landlords poisoned wells, destroyed agricultural tools, or cut down forests. The CCP widely disseminated stories of landlords' crimes as propaganda to build support for its view of the landlord class as an evil whole.