1949 April 30 Shanghai Gold Yuan airmail to USA. The $41,000 cancelled stamps on the front were no longer adequate and $400,000, paying the correct, rate was added to the reverse, but uncancelled. (2 images)

1949 April 30 Shanghai Gold Yuan airmail to USA. The $41,000 cancelled stamps on the front were no longer adequate and $400,000, paying the correct, rate was added to the reverse, but uncancelled. (2 images)