I want to know the answer to the following question:
Which emperor allowed Han migration to Dzungaria?
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?
Answer: no