交单议付 meaning in Chinese

document presentation/negotiation

Any such requests will receive our consideration at the time of presentation
如果你们按时交单，能否在交单议付时提供一份修改的信用证。
Draft drawn under this credit must be presented for negoatation in china on or before 30th august
根据本证项下开具的汇票须在1977年8月30日或该日前在中国交单议付
About l / c * * * xx ( here number of credit ) , because exceed , put , hand in single and negotiable , issuing bank propose this item accord with a bit now , please notify applicant get issuing bank their retire document honoured , the issuing bank can arrange to pay the bill after accepting
关于l / c * * * xx (此处为信用证号) ,由于超装交单议付,现开证行提出该项不符点,请通知applicant到其开证行赎单承兑,开证行受理后方可安排付款