回复：the expiration date of visa

Thanks for your prompt reply. I understand that the expiration date of visa and the length of stay are two different concepts. What confuses me is that when they re-enter the country, as you said, on the last day the visa is valid, wheather or not the newly issued staying period relates to the length they stay this time. In other words, if they get a 6-month stay at the port of entry this time, will the 6-month include next time visit since it's an re-entry under the same visa?

Thanks again.