To boost the railway's standing, Hungtu Alishan has forged plans to ally with Oigawa Tetsudo of Japan and Brienz Rothorn Bahn of Switzerland, forming the "three sisters of the Forest Railway."
為了拉抬聲勢，宏都計畫與日本的大井川鐵道及瑞士阿爾卑斯山的 BRB，結盟為「森林鐵路 3 姊妹」。