I currently hold a one year multi-entry visa to China. I must travel to China for business arriving on March 28th 2011 and leaving on April 5th 2011. My current visa ENTER BEFORE date is March 29th 2011, the day after I will arrive. Does my visa have to be valid for the duration of my stay or do I just need to arrive in China before March 29th? (I will only be staying eight days).

Thankyou