This Chinese postage stamp features Dr. Sun Yat-sen, the founding father of the Republic of China, depicted in a formal portrait. The design carries the iconic Blue Sky with a White Sun emblem above, symbolizing the Kuomintang (Nationalist Party). The face value is 300 yuan, printed in deep green. The bottom overprint reads “限東北貼用” (For use in Northeast China only), indicating restricted regional circulation. Such overprints were applied during the turbulent civil war and inflationary years of the late 1940s, making them highly collectible for specialists in Chinese postal history.