Line 2: Remove "to", which is redundant; There should be "reflects" after it. The foreign exchange reserve mentioned above is a whole concept.

There seems to be no connection before and after "but also". "Not only means ... Butalso" is not only ... but what you want to express is a turning point, which is not used correctly here. There are some long sentences behind, which are a bit awkward. Change the structure. Do you want to express "... ah ... ah ... ah ... ah ... ah ... ah ...

That should come before "are" because "significance" is a noun, for example, it is very important to study hard, and it is a bit awkward to match "important" with "significance"

My English is not good, I'm sorry.