Hi, there is no flight between Islamabad and Zhanjiang. You are suggested to take a direct flight to Beijing first, which is available on each Monday and Friday, operated by China Southern Airlines and Pakistan International Airlines. And then take a domestic flight to Zhanjiang. Take one for example: CA1877, Beijing-Zhanjiang, 08:05-11:40. Anyway, you can make an online enquiry about the airfare with your exact departure date.