Introduction to the monument to the sacrifice site of Martyr Li Fulin: About 10 kilometers north of the Xianghe Forest Farm site, there is a Heixiazi ditch on the north side of Betel Village. There is a cave in the ditch, commonly known as the Eagle's Nest, which is the site of the old Manzhou Provincial Committee. The location is where Commander Li Fulin and his comrades worked and lived. Commander Li Fulin once carried out great anti-Japanese and national salvation activities here.