[经] sales discounts on customers partial payments

gù kè cháng huán bù fèn zhàng kuǎn de xiāo huò zhé kòu ㄍㄨˋ ㄎㄜˋ ㄔㄤˊ ㄏㄨㄢˊ ㄅㄨˋ ㄈㄣˋ ㄓㄤˋ ㄎㄨㄢˇ ㄉㄜ˙ ㄒㄧㄠ ㄏㄨㄛˋ ㄓㄜˊ ㄎㄡˋ