 The oldest companies still operating in Ulaanbaatar date to the early MPR.Only Gandantegchinlen Monastery has been operating nonstop for 205 years with a 6 year gap during World War II but whether it can be seen as a business is still debated.As the main industrial center of Mongolia, Ulaanbaatar produces a variety of consumer goods  and is responsible for about two-thirds of Mongolia's total gross domestic product (GDP).