I want to come, which is nearest airport international , i am company from karachi pakistan

The nearest international airport is Hangzhou Xiaoshan Airport, where direct buses to your destination are available. You may search if can be an option from your starting point.

If you land in Shanghai PVG, take shuttle bus line 1 to Hongqiao Rail Station in around an hour and take a high speed train to your destination in 100min. Anyway, I still wanna tell you direct buses are available at PVG and it takes 4.5h.