7th auxiliary issue on Russian stamps of the 17th, 20th, and 21st issues. The auxiliary issue stamps of Harbin were in postal use at the stations of the Chinese Eastern Railway.
Russian post in China is a postal service organized by the government of the Russian Empire on the territory of China and operating from 1870 to 1920.
According to the opinion of the State Council, approved by the highest authority on March 23 (April 4), 1870, the Russian post in China was established as a private enterprise under the patronage of the Russian government and receiving from it a subsidy of 17,600 rubles per year. The Russian post was maintained between Kyakhta and Tianjin, and along this route four Russian post offices were established: in Urga, Kalgan, Beijing, and Tianjin. These offices accepted and dispatched all kinds of correspondence to all places in Russia and beyond its borders.
The 1917 issue: a typographic diagonal surcharge of the denomination in Chinese currency in black on Russian stamps of the 13th, 16th, 17th, and 19th issues.
By agreement with the Soviet Government of Russia, the Russian post offices in China were closed in December 1920 to January 1921.