Tukutou... The pleasant sound of the "woodpecker" echoed in the forest. However, more than 80 years ago, this sound was a "secret radio wave" of the warning and contact of the Northeast Anti-Japanese Allied Forces. Shaking the "Ring Wood" will make a sound similar to a woodpecker. The Anti-Japanese United Army soldiers can express various meanings using the different sounds made by the "Ring Wood", which plays an important role in the process of the Anti-Japanese United Army's hidden message transmission.

According to reports, more than 80 years ago, the First Army of the Northeast Anti-Japanese Allied Forces led by Yang Jingyu formed the Third Division in Daomou Village, Pingdingshan Township, Xingjing (now Xinbin County). Since then, this team has been active in Xinbin, Fushun, Qingyuan and other places.

The Monkey Stone National Forest Park, located in Xinbin Manchu Autonomous County, Fushun City, Liaoning Province, has discovered a relatively complete group of Northeast Anti-Japanese Allied Forces secret camp sites. A total of 7 Anti-Japanese Allied Forces camps have been discovered, and more than 100 architectural sites have been found.

Reporter: Gao Ming

Produced by Xinhua News Agency Audio and Video Department