Ka kammala wannan magana: A shekara ta 1914, Yaƙin Duniya na Ɗaya ya ɓarke, kuma Jamus tana fama da yaƙi a gida. Japan da Ingila sun yi amfani da damar kuma sun kaddamar da shirin
Kewaye da Tsingtao. An lalata Shantung Railway Syfang General Repair Works a lokacin kewaye. A shekara ta 1915, Daular Japan ta tilasta wa gwamnatin Jamhuriyar Sin ta yarda da Bukatu ashirin da ɗaya, wanda ya tabbatar da karɓar Japan na yankunan Jamus da kadarorin jirgin ƙasa a Shantung. An canza sunan Syfang General Repair Works zuwa Shantung Railway Syfang Workshop, wanda sojojin Japan ke gudanarwa na ɗan lokaci. A watan Maris na 1915, sojojin Japan a Tsingtao sun kafa Hukumar Kula da Railway ta Shantung, wacce ke da sassan biyar: al'amuran gama gari, sufuri, injiniya, lissafi da hakar ma'adinai, da kuma Tsingtao Workshop. A lokacin mamayar Jafananci, an gina ƙarin kayan aiki kamar masana'antun simintin yashi, tashoshin fasinjoji, masana'antun ƙafafun, tashoshin jan ƙarfe, kuma adadin ma'aikata ya kai sama da 1,500.