Tianjin and Community of Madrid are friendly associated on April, 7th,  in 1998.

Novosibirsk is Russia's third-largest city, after Moscow and Saint Petersburg, and the largest city of Siberia. It is the administrative center of Novosibirsk Oblast as well as of the Siberian Federal District. The city is located in the south-western portion of the federal district and occupies an area of 477.2km2, where inhabits a population of 2,671,700(2003).

Novonikolayevsk began reconstruction in 1921 at the start of Lenin's New Economic Policy. It was given its new name, Novosibirsk, in 1926. The new name can be translated as "New Siberia City".

 Prior to relocation of its headquarters, S7 Airlines had its head office in Novosibirsk. Rapid growth and industrialisation were the reasons behind Novosibirsk's nickname: the "Chicago of Siberia".The rapid growth of the city prompted the construction of a Hydroelectric power station,causing the creation of a giant water reservoir—now known as the Ob Sea. As a direct result of the station's construction vast areas of fertile land were flooded as were relic pine woods in the area, additionally the new open space created by the reservoir's surface caused average wind speeds to double, increasing the tempo of soil erosion.

Tram rails were laid in 1954, by which time Novosibirsk reached a population of 287,000, making it the largest city in Siberia. The following year the original Ob River Bridge was replaced by the new Kommunalny bridge. Novosibirsk was in the center path of the Solar eclipse of August 1, 2008 with a duration of 2 minutes and 20 seconds.

The most prominent tree genera native to Novosibirsk are birch, pine, and aspen. Some mountain ash, hawthorn, spruce, and fir are also present. European species of apple, ash, elm, linden, and oak have been successfully introduced.