Thanks for your understanding. Last

Thanks for your understanding. Last time changed, i am willing to help HSM so that i submitted. However, the finance told me OA is OA and LC is LC, can't switch at the last moment. Besides, the cost is big different to us also. Come to the end, i only can scrafice myself but no any choice.
YCM finance is very straight on the payment term. I think you well known better than me.
Result, please let me when will you use OA or LC at the beginning in order to prevent any confusing in the further.