Downbeat, but determined

The file room on the 11th floor of the Jilin Provincial Archives in Changchun is one of the most important in the building. The room - which is kept at a constant temperature of 14C to 24C and with humidity stabilized at between 45 percent to 60 percent - contains nearly 100,000 hand-written files relating to Japan's invasion of China before and during World War II.

The importance of the files means Chen Jiarong, the director of the room and a veteran at the archives, dare not relax.

"These files are the most precious and important in our archive. As the translation and research work continues, more information will emerge gradually," she said, noting that the files relating to the "Monthly Postal Review" have attracted attention in historical and archival circles across China.