From the Washington Post:
More than 200,000 Chinese filed through the remains of Japan’s notorious Unit 731 here last year, visiting the ghosts of World War II. In exhibits mounted throughout the bleak headquarters building, they saw wrenching descriptions of biological warfare experiments carried out on thousands of Chinese prisoners from 1939 to 1945.
The phrase “Do not forget us” has been inscribed on the wall of one room, where visitors can see the names and photos of some of those who received botulism injections, were made to suffer frostbite or had their internal organs removed by Japanese military doctors.
Here.