China. (Indo Chines Post Office In Canton). 1917. Registered envelope addressed to bearing French P.O. in Canton SG 51, 2c brown (5) and SG 56, 20c violet (pair) tied by Canton/Chine double ring with hand-struck 'R' endorsed 'via Siberia' with French Post Office Shanghai transit with censor tape tied by oval '117' censor cachet and Thun arrival. Very fine.