Chinese edit

 
up; on; on top
up; on; on top; upon; first; previous or last; upper; higher; above; previous; to climb; to go into; to go up
go upstream; trace the source
trad. (上溯)
simp. #(上溯)

Pronunciation edit


Verb edit

上溯

  1. (literally) to go upstream
  2. to trace back