Which two inventions had the greatest impact on trade in china during the middle ages?

I think it is woodblock printing and gunpower it is from the tang dynasty

to kill a mockingbird is a 1962 american drama film directed by robert mulligan. the screenplay by horton foote is based on harper lee's 1960 pulitzer prize- winning novel of the same name. it stars gregory peck as atticus finch and mary badham as scout. in 2003, the american film institute named atticus finch the greatest movie

hope this : d

b. andrew