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So overall this is a well organized essay and you describe and support the documents.
Biggest issue would be sourcing. For intended audience, why does it matter that it is aimed at Chinese administrators? Without a clear and explicit connection to your thesis it is just a random fact.
As for the historical context it is the same issue, lacking clear and explicit evidence. you use the term opium war, but that term alone is not enough for historical context reasoning, because it does not connect to your thesis.
I hope this helps.
