Russian Post in China. Tientsin. 1918. Prisoner of war printed envelope sent insured for 3000 Rubles to POW in Ygsa (Siberia). Franked on the reverse with 3c./3 k. red, 4c/4 k. red, 10c/10 k. blue, 15c./15 k purple/blue and 70c/70 k. brown/orange in a strip of 3. Canc. 15.2.18, russian canc. CHANGCHUN I.J.P.O. 6.3.18 and arr.mark 31.3.18. Closed with beautiful wax seals. Very high franking on rare insured cover. Excellent condition. Exhibition item [ ✉ ]