Figure 4 shows two pages from the specialized Chan catalog that cover this issue. Re-surcharges are known misplaced or inverted, doubled and even tripled. The issue date is unknown. Used examples are so scarce that Chan does not assign values. Four of some 83 Chinese surcharged stamps released from January 1946 through September 1948.
Some specialized catalogs recognize even more surcharge types.
Four of these are shown in Figure 5. With repeated postal rate changes, these stamps were issued in groups. Collectors assign titles to each surcharge group, which vary according to value box and Chinese character configuration, making sorting these stamps that much easier. Most stamps were valid throughout the Nationalist-controlled areas. Given that even basic stamps were printed under stressful conditions, it's easy to understand the causes of the host of stamp and surcharge varieties that collectors eagerly seek.