arrival at Terminal 3 and connecting flight at Terminal 1

Flight SQ 800 arrive Beijing at 07:10 am 04 Dec 2012
Terminal 3 custom and luggage clearance and then I have to proceed to Terminal 1
connecting flight CN7129 at 09:55 am (Terminal 1) to Harpin
do I have enough time to board the flight CN7129 at 09:55am?
Thank you very much for your attention and early reply.
siew eng