These complicating factors demanded an unusual varieties of overprinted or surcharged stamps and over a long period of general usage these had made it very difficult to document early Chinese stamps comprehensively or by chronological order alone.
These complicating factors demanded an unusual varieties of overprinted or surcharged stamps. These had made it very difficult to document early Chinese stamps comprehensively. This was over a long period of general usage. These had by chronological order alone. This was over a long period of general usage.