In the shadows of World War II, one of its darkest chapters unfolded in northeast China – the atrocities of Japan's Unit 731.

Hidden from the world, the unit conducted horrific biological experiments on civilians and prisoners, leaving scars that still haunt generations.

Today, decades later, rare letters, surgical tools and experimental vessels stand as silent witnesses to those crimes against humanity.

They remind us that remembrance is more than memory – it is a duty, a solemn promise to the future: never again.