How can i get the immegration of South Korea or open work permit?

The only way to get permanent residency in Korea (F5 visa) is to be married for over 2 years on the F2 visa, at least 30 million won in the bank and a lease on an apartment. If you are not married, you need to be here for at least 5 years, no criminal record, making at least twice the national average salary, and have a high knowledge of Korean. To get a work permit, contact the local Korean consulate in Pakistan, they are always offering factory jobs, or engineering jobs if you are well qualified. Fill out an application there. They always offer those types of jobs in Phillippines, Pakistan, Vietnam, Saudi Arabia, just to name a few.

There is no such thing as an "open work permit" in South Korea. The only way you can work here is to be sponsored by a particular employer. Koreans aren't interested in hiring foreigners unless it is to abuse them in sweatshops for little to no pay. Political refugees (other than North Koreans) find it nearly impossible to obtain asylum in this country, so you should forget "permanent residency"