This stamp from the Republic of China features the portrait of Dr. Sun Yat-sen, the founding father of modern China. Printed in green, it belongs to the long-running Sun Yat-sen definitive series issued in the 1940s–50s, which saw many printings, denominations, and reprints due to inflation. The design shows Sun Yat-sen in a formal suit, framed by Chinese characters for “Republic of China Post” at the top. The denomination of 10 yuan is clearly inscribed at the bottom corners. These issues are highly collectible due to their historical significance and numerous printing varieties.