1878, the Qing government set up post offices in Beijing, Tianjin, Shanghai, Yantai and Niuzhuang (Yingkou), which were subordinate to the customs. In the same year, the Shanghai Customs Registration Office printed and issued a set of three dragon stamps. A golden dragon with five claws is drawn in the middle of the stamp pattern, which is lined with clouds and waves. The color and face value of stamps are different. The face value is silver (green, postage for printed matter) and three cents silver (red). Surface mail postage) and five cents silver (orange, registered mail postage). This is the first stamp issued in China, and philatelists used to call it "Customs Dragon" for short. In Qing Dynasty, most stamps were designed with "dragon", because "dragon" embodied supreme authority and was the image of the supreme ruler. Recently, it is a symbol of the supreme ruler. However, it is difficult to find out the designer's name and exact issuing time, which has become an "unsolved case" in the study of the early stamp issuing history in China. The "Dalong" stamp is a copper stamp, carved by a sculptor hand by hand. Because the imported paper is different, it is brushed three times. The first issue was made by 1878, because it was made of hard translucent tissue paper. 1882 The second issue of "Tissue Paper Dragon" is called "Wide-edged Dragon" because the spacing between each stamp is slightly larger when typesetting, and the ticket width is 2 mm wider than that of the first issue. Among them, 50 unused new tickets are rare, and only one new ticket with 25 pieces survives, which is the most famous early stamp orphan in China. The third time was sent by 1883. Paper is thicker than the previous two times, commonly known as "thick paper dragon". Because of the punch, there are two kinds of tooth holes, Koga and rough teeth. The smooth tooth is also called "thick paper smooth tooth dragon" stamp.