What is the first set of stamps in the history of China?

1840 After the Opium War, the long-closed door of the Qing Dynasty was opened by capitalist invaders. Four months before the treaty of nanking was signed, the British authorities set up the so-called British Post Office in Hongkong. Later, French, American, German, Russian and Japanese followed suit and set up private post offices, infringing on China's sovereignty. 1863, after being appointed as the General Tax Department of Customs, the Englishman Hurd not only mastered the power of China Customs, but also attempted to seize the power of China Post. 1878 (the fourth year of Guangxu reign in Qing dynasty), he ordered Deterlin, a German from Tianjin Taxation Department, to conduct postal services in Beijing, Tianjin, Yantai, Niuzhuang and Shanghai on a pilot basis. 15 August (July 17), the first set of stamps in China was issued. There are three kinds of stamps: one silver coin, three silver coins and five silver coins. Because the stamp is painted with a dragon pattern and the stamp is relatively large, it is called a dragon stamp. Seven years later, the second set of stamps was issued, and there were still three kinds of stamps: one silver, three silver and five silver. It's also a dragon pattern, also called Xiaolong Seal. 1897 Qing government officially opened postal service. This year, a set of *** 12 stamps was issued, including three patterns of dragon, carp and flying goose, which were printed with Japanese lithographs, so they were also called "Japanese lithograph tickets".