what is the distance from shanghai airport to weihai city, shandong.

Well, it is about 1,000 kilometers between Pudong International Airport and Weihai City, and 200 kilometers or so to Hangzhou, Zhejiang.
To Weihai City, you may take the airport shuttle bus line 1 to Hongqiao Railway Station first. Upon arrival, you may catch a high speed train to Weihai Railway Station directly. There is only one train departing at 06:12 every day.
To Hangzhou, Zhejiang, you can take a long distance bus at the airport. This bus departs at 08:40, 9:50, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00, 16:40, 17:20, 18:00, 19:00, 20:00 and 21:00. The duration is around 3 hours.