Rubuta ci gaba don wannan sakin layi - A lokacin yakin duniya na I, yankin ya ci nasara da haɗin gwiwar Anglo-Japanese a lokacin Siege na Tsingtao na 1914
kuma Allies masu nasara na Yaƙin Duniya na I sun ba da ci gaba da haya ga Daular Japan kan ƙin yarda da Jamhuriyar China. Yankin ya koma hannun kasar Sin a shekarar 1922.