I have lived in Soviet Union. In the end of SU I even as a 13 year old child bought USD, and earned money from that, when changed back after months.
The same was done after getting independence. You bought Finnish marks bought USD or German marks and after few months changed back, because the economie of Finland didn’t had best days in the 90’s and USD rose in value.
You literally make money with that.
In Estonia we plant about 20-40 millions of trees every year.
RMK ( State Forest Management Center) alone plants about 20-25 million trees every year.
And we are nation with 1,3 million people. So for China that number over the years isn’t big at all.
I always laugh when in the western news there is some organization, what makes big words that they planted 2 million trees and if that is something of a big achivments what should be boasted around the news.