I want to know the answer to the following question:
What was the main government entity that ran the territories like Tibet?
All the background I'm provided with is that "Manchuria was originally separated from China proper by the Inner Willow Palisade, a ditch and embankment planted with willows intended to restrict the movement of the Han Chinese, as the area was off-limits to civilian Han Chinese until the government started colonizing the area, especially since the 1860s.". Is that enough to answer the question?