I have Chinese L Visa issued 11 March 2009, and expires 11 March 2010. It shows "M" on the Entries line and for duration of stay, it states 30 days. I have used it two times to visit China.
I plan to visit China again, arriving 8 March 2010 and departing 15 March 2010.

Can I use the Visa I now have or will I need a new One?

Thanks for your kind assistance.