Is there any visa fee for Pakistan ?

Yes, you need to pay for it. You can either send your application to the China Embassy in Pakistan or HK Immigration Deparment. If the embassy handles your application directly, you need to pay 3,000 rupees. If it transfers your application to HK side, you need to pay 2,000 rupees addtionally as the telecommunication fee. If you send your application to HK Immigration Department by yourself, you need to pay HKD 190.