Will someone help me with my history homework?

So I’m having a really tough time answering some of my questions for my history homework and was wondering if someone could help me out.

The questions I still need to answer are
1. Who is the audience
2.What sort of a social construction are they advocating here?

Here is the link to the letter on which the questions are based.
http://academic.brooklyn.cuny.edu/core9/phalsall/texts/taiping.html

By the way, yes I am trying to do this by myself but I seriously cannot figure these two out.