This high-denomination 20,000-dollar stamp from the Republic of China (ROC) features a finely engraved portrait of Dr. Sun Yat-sen, the founding father of modern China. Issued during the hyper-inflation period of the mid-to-late 1940s, these large-value definitives were essential for rapidly rising postal rates. The crisp violet-purple shade and detailed line engraving make this issue a notable piece in Sun Yat-sen definitive studies. Highly sought after by specialists due to its multiple printings, rate usages, and inflation-era postal history relevance.