Visit visa extension after 4 months possible or not?

Hi,
I am planning to come Oman next month on a visit visa for 3 months I heard I can extend that visa up to 1more month , after that is it possible to extend my visa for some more months ,if not after how many months I can come back to Oman on a visit visa?

Visit Visa is valid for 3-months, extendable by 1 more month only. Further extension is not possible.

After that you have to necessarily exit, re-apply and return immediately, just as soon as your new vist visa is issued, which can happen immediately.

Thank u sir