China, postal history, group of four coversprising: a 1948 printed matter Airmail to London, forwarded within London, three overprinted stamps tied "PEIPING /24" (should be "48"?), London arrival mark "23 DEC 1948"; a 1947 registered Airmail cover to London, forwarded to Isle Of Wight, various stamps, some overprinted, PEIPING and SHANGHAI cancels; a long narrow registered cover, possibly 1948, from CHANGSHOW to London, various Chinese annotations, customs cachet, good array of stamps; and a registered Airmail, possibly 1948, with block of six and pair overprints, to London, tied PEIPING cancels (4)