[经] principal sum of the bill of exchange

huì piào suǒ zài de jīn é ㄏㄨㄟˋ ㄆㄧㄠˋ ㄙㄨㄛˇ ㄗㄞˋ ㄉㄜ˙ ㄐㄧㄣ ㄜˊ