The central part of the city is primarily built on a rectangular grid plan. The city's main street is the east-west Chui Avenue (Chuy Prospekti), named after the region's main river. In the Soviet era, it was called Lenin Avenue. Along, or within a block or two from it, many of the most important government buildings, universities, the Academy of Sciences compound, and so on, are to be found. The westernmost section of the avenue is known as Deng Xiaoping Avenue.