China 1944-45 Chungking Central Trust printing SG P711/16China 1944 45 Chungking Central Trust printing, Parcels Post set of 6 to $20,000 red orange, SGP711 16. A very attractive and fresh quality mint set. The $20,000 in particular is very scarce. Parcel Post Stamps were not on sale in unused condition, but were affixed to parcels and cancelled by postal officials. In 1948, permission was given for cancelled stamps to be sold to the public. Unused Parcel Post stamps such as these were probably from stocks