1920s an exhibit page of Tianyi Letter Office, containing red band cover, inner letter and express stamp, reflecting the delivery of Qiaopi
1920s an exhibit page of Tianyi Letter Office, containing red band cover, inner letter and express stamp, reflecting the delivery of Qiaopi delivery between Philippines and China. Tianyi was the largest letter office in Philippines during that period.1920年代一頁以天一信局為題之展頁，包含一件紅條封、一件內信及一枚快信票，反映了中國與菲律賓間之僑批往來。天一信局為當時菲律賓規模最大之批局。
