No one buys the general appearance, and it is not worth a few to collect a full set of good looks.
1968 Guangdong General Food Stamp
The key to collection is "rare is precious". The first issue in history (during the Anti-Japanese War) took a long time, and everyone had nothing (not circulating) of value.
1955, 1956 and 1957 three sets of food stamps are usually called the encyclopedia of public stamps.
The existing quantity is insufficient 100.
Some food stamps have been printed, but for various reasons, they have not entered the circulation field. These food stamps have always been sought after by food stamp collectors.