Meiou Sun, Hu Sun, Jihang Yu, Jingcai Li, and Yujuan Gao. “Case Study Analysis of Research and Study Activities at the Liangshui National Nature Reserve Base in Heilongjiang Province”. Education Research on Study Tours and Practice 2, no. 3 (June 30, 2026): 76–80. Accessed July 15, 2026. http://ojs.iajournals.cn/index.php/erstp/article/view/400.