This high-value 20000-yuan definitive from the Republic of China features the classic engraved portrait of Dr. Sun Yat-sen, the founding father of modern China. Issued during the hyperinflation period of the late 1940s, these large-denomination Sun Yat-sen stamps are an essential study area for specialists in China’s monetary and postal history. The rich purple shade and fine linear engraving showcase the transitional printing styles of the era. Examples with clean perforations and strong color, such as this one, are sought after for advanced China collections.