My China Visa, Business (F) is expired. I would like to renew my 1 year, mulit-entry visa.

Please, I have had trouble finding a english service travel agent to work with. Can I please make application in person? I have completed all the required documentation and appliations. I am an American living in Seoul, South Korea, have a valid Korean Alien Registration Card valid for more than 6 months. I travel to Beijing at least every quarter to provide technical assistance to commercial aviation partners.