I am a large truck owner. I just took 49 tons of cucumber from Hami to Islamabad in Hami to go out of the Red Flag Labu Port. What needed?

I am a big truck owner. I just took 49 tons of cucumber from Islamabad, Pakistan, Pakistan, to go out of the Red Flag Laph Port. What procedures and documents are needed? Is there a lot of cars in Pakistan? What documents do I need to apply for Pakistan? thanks