China. (India). 1943. Air Mail envelope written from the 'Friends Mission, Chin Lung Kai, Chengtu, Yunnan, S.W. China' addressed to London bearing SG 641a, $5 carmine and SG 656, $10 red-brown (imperf) tied by Chengtu date stamp, endorsed 'Via B.O.A.C. to Egypt/ then quickest way', routed via India with Calcutta 'P.C. 90/ Opened by Examiner' label tied by framed 'Passed/ DHA/ 3' censor hand-stamp. Very fine.