Validity of the letter of credit = latest shipment date of the last batch of goods+presentation date (generally 2 1 day), that is, the letter of credit arrives 2 1 day after the latest shipment date, and documents are generally issued three days before shipment. Then let's assume that the documents sent from Canada will be received in two weeks and the ship will arrive in Hong Kong in about 25 days. Then your letter of credit will usually expire about 70 days before receiving the payment. Therefore, the expiration of the letter of credit does not affect the payment, including the general sight letter of credit, unless there are special provisions in the letter of credit to collect the payment before the expiration.
For usance letters of credit, generally speaking, the issuing bank (that is, your bank) will first draw an acceptance draft for the receiving bank (that is, your bank), and then your bank can give you the payment first, and then settle it within 90 days. When it expires, the receiving bank (that is, your bank) will ask the issuing bank (that is, your bank) for money with this acceptance draft.
Would you please tell the level 7 manager not to mislead the newcomers? See you many times.