The The Monument of the Death of Inspector Nojiri and Boundary Guards Ruskau, Babai, Pan A-shen, Pan A-wu, and Pan Na-zi of Karenkou Prefecture is located on the mountainside of Batongguan Traversing Historic Trail, on an altitude of 1,315 meters, 15 minutes away from Midori Police Post. This monument is an obelisk built of reinforced concrete. It mainly commemorates Inspector Nojiri and five Boundary Guards who were killed in an ambush on October 10, 1919 during the excavation and construction of the Batongguan Trail.