fortifications of Xi'an
... that the ancient fortifications of Xi'an were used as air raid shelters in World War II?
... that the ancient <b id="mwCCU"><a href="./Fortifications_of_Xi'an" id="mwCCY" rel="mw:WikiLink" title="Fortifications of Xi'an">fortifications of Xi'an</a></b> were used as air raid shelters in <a href="./World_War_II" id="mwCCc" rel="mw:WikiLink" title="World War II">World War II</a>?