[经] rate of collection of accounts receivable
yīng shōu zhàng kuǎn shōu kuǎn lù ㄧㄥ ㄕㄡ ㄓㄤˋ ㄎㄨㄢˇ ㄕㄡ ㄎㄨㄢˇ ㄌㄨˋ