As a condition of that lease, they have to keep all the inhabitants who can continue to elect their looting politicians while the ChiComs actually administer the place.
Detroit residents are not allowed to vote in U.S. national or Michigan elections, only local, for the duration of the lease.
Well we used to have special administrative regions -- they were called states.
Now statehood means nothing.
Detroit could have survived had the citizens believed they still had control of their city and the state that gave them that power.
But the loss of state's rights, and the de facto takeover of cities and towns by the Federal government during the 60s meant the unruly parts of Detroit could no longer be contained. The city of Detroit was legislatively stolen from the people of Detroit and handed over to the worst elements.