[经] letter of credit with red clause, red clause credit

hóng tiáo kuǎn xìn yòng zhuàng ㄏㄨㄥˊ ㄊㄧㄠˊ ㄎㄨㄢˇ ㄒㄧㄣˋ ㄩㄥˋ ㄓㄨㄤˋ