The characters combine literally and powerfully to mean “Japan invades China.” The choice of 侵 (invade/aggress) and 华 (the cultural name for China) makes the phrase both a direct accusation and a lament for the violation of the nation.
The term 日本侵华 (Rìběn qīnhuá) is central to the modern Chinese national consciousness. It represents the lowest point of China's “Century of Humiliation” (百年国耻), a period from the mid-19th to mid-20th century when China was subjugated by foreign powers. The memory of this era fuels a powerful sense of modern patriotism and a collective vow to never let the country be so vulnerable again. A useful comparison in Western culture is the term “the Holocaust.” Like “the Holocaust,” 日本侵华 is not merely a descriptive historical term. It is a moral and emotional touchstone that carries the weight of immense human suffering and atrocity. Both terms are used with utmost seriousness and serve as a solemn remembrance for the victims. While a Western historian might use the more neutral “Second Sino-Japanese War,” a Chinese person will almost always use 日本侵华 or 抗日战争 (War of Resistance Against Japan) because these terms center the Chinese experience of being invaded and the moral imperative of resisting. This history is taught from a young age and is a constant presence in Chinese media, museums, and national memorials.
This is a formal and serious term, never used casually. Its usage is concentrated in specific contexts:
The connotation is universally negative and carries a heavy emotional charge. There is no neutral or positive context for this term.