information about foreign physical examination centre in islamabad

Dear Sir,
i m working as a junior engineer at power station mangla and recently nominated to attend seminar on "Rural Electrification for Developing Countries" in Hangzhou Zhejiang China from 30-08-2012 to 26-09-2012.For this one of requirements is to submit foreign physical examination certificate but i cannot find the center from where to place to go for this.Kindly guide me the centers in Islamabad or Rawalpindi from where i can check up and complete form.