More than half the wealth created in Urga in the period from 1639 to 1688 is thought to have been lost in 1688. Only in 1701 did Urga return to the region and start a second period of expansion, but it had to remain mobile until the end of the 70-year long Dzungar-Qing Wars in 1757. After settling down in its current location in 1778 Urga saw sustained economic growth but most of the wealth went to the Buddhist clergy, nobles as well as the temporary Shanxi merchants based in the eastern and western China-towns of Urga. There were numerous companies called ''puus'' (пүүс) and temple treasuries called ''jas'' (жас) which functioned as businesses but none of these survived the Communist period. During the Mongolian People's Republic private property was only marginally tolerated while most assets were state-owned. The oldest companies still operating in Ulaanbaatar date to the early MPR. Only the Gandantegchinlen Monastery has been operating non-stop for 205 years with a 6-year gap during World War II but whether it can be seen as a business is still debated.