我方接受贵方C109号订单订购1,400件“英雄”牌男式衬衣，请按合同规定的条款开立以我方为受益人的不可撤销即期信用证，时间不晚于2019年5月5日。WeconfirmhavingacceptedyourorderNo.C109for1,400"Hero"brandmen’sshirts.YouarekindlyrequestedtoopenanirrevocablesightLetterofCreditinourfavor__________.
C
on or before May 5, 2019
D
on and after May 5, 2019
