The Song dynasty and earlier used the 1:4 type or four-beads abacus similar to the modern abacus including the shape of the beads commonly known as Japanese-style abacus.
ðə sˈɔŋ dˈaɪnɐsti ænd ˈɜːlɪɚ jˈuːzd ðə wˈʌn:fˈoːɹ tˈaɪp ɔːɹ fˈoːɹbˈiːdz ˈæbækəs sˈɪmɪlɚ tə ðə mˈɑːdɚn ˈæbækəs ɪŋklˈuːdɪŋ ðə ʃˈeɪp ʌvðə bˈiːdz kˈɑːmənli nˈoʊn æz dʒˌæpənˈiːzstˈaɪl ˈæbækəs.