The Chinese abacus, also referred to with it's original name Suan Pan, is the Chinese version of the abacus.
Each rod of the Suan Pan has five beads on the bottom deck and 2 beads on the top deck.
Starting from the right, the beads on the rightmost rod represent units (1,2,3 ... ), next are tens (10,20,30 etc.), then the hundreds, and so on.
You can check your answers for this puzzle on Geochecker.com.