China. (Interrupted Mail - Ireland). 1945. Air Mail envelope addressed to 'Sr M. Veronica, Catholic Mission, Nanchenghsien, Kiangsi, China' , endorsed 'Free Unoccupied China', bearing Ireland SG 134, 1s brown (strip of three) tied by Irish 'Gaelic' Dublin double ring '5th Feb 1945' with bilingual pink Irish censor label, routed via London with 'Crown/ Opened by Examiner/ 68' censor label with oval hand-stamp 'O.A.T.' in carmine on face (Onward Air Transmission) and Post Office 'P.C. Form' reading 'Returned To Post Office/ for Return to Sender as/ this letter is addressed to an/ Enemy Occupied Country' tied by boxed instructional 'Undelivered For Reason Stated/ Return To Sender' and returned to Dublin and re-sealed with bilingual 'Officially Sealed/ In The Post Office' label and Baile Atha Cliath receiver '12th May 45' on reverse.
The Provence of Kiangsi was under Japanese Occupation during the second 'Sino-Japanese War'
Note the 'O.A.T.' offset on reverse of the Post Office form (removed from envelope to show address and Onward Air Transmission).