If you are in a hurry and the remittance fee is expensive, this is real-time remittance. If it is normal, it is a batch, and the speed is of course different.
If you want to remit foreign exchange, you need to report it, the leader needs to sign it, or you need to change careers halfway, which will be slower. Also, if you remit a large amount of foreign exchange, banks need to allocate positions upwards, which will naturally be slow.