Zhang and his team spent more than 10 years studying the Nanjing Massacre. In 2010, they released 72 source books.
Bu Ping, a researcher with the Chinese Academy of Social Sciences, said their endeavor is important.
"The Nanjing Massacre is now deeply associated with politics, people's emotions and different academic views. But this compilation has revealed the must-know basics. Their efforts are much appreciated," Bu said.
Professor Zhang said the team worked to uncover the truth.
"Our study will stand the test of time," he said. A translation of the books into English and Japanese is under way.
Cumquat market in S China's Guangxi