Will my diplomatic/official passport help support my China visa application if I plan to visit Shenzhen from Hong Kong?

Good day...
I had the chance to visit China in 2007 using a diplomatic/official passport so I was exempted in getting a China visa. This May 2011, I plan to visit Shenzhen from Hongkong. Will it help if I bring my diplomatic/official passport to support my China visa application? I will be using my regular passport in this travel to Hongkong. Thank you very much.