Is it true After conquering the urban centers of Central Asia Mongol troops were ordered to stay and occupy conquered lands?

No, it is not true that after conquering the urban centers of Central Asia Mongol troops were ordered to stay and occupy conquered lands. In fact, the Mongols typically did not leave large garrisons in the cities they conquered. Instead, they relied on a system of indirect rule, in which they would appoint local leaders to govern on their behalf. This allowed the Mongols to maintain control over a vast territory with a relatively small number of troops.