This classic Republic of China definitive shows Dr. Sun Yat-sen, overprinted with a bold blue “20.00” surcharge used during wartime inflation issues. The deep carmine engraving highlights the fine linework typical of the early Chiang Kai-shek era postal printings. Overprint clarity and centering are key for collectors, and this example shows strong, sharp surcharge characters. A desirable transitional-value stamp widely sought after in Chinese philately. Excellent addition for specialists in ROC surcharges or Sun Yat-sen series varieties.