I am reaching guangzhou on 23 feb 2013 and leaving on 26 feb 2013 to India.

I want to visit macau for one day say on 24 feb 2013 from Canton and come back Canton on 25 feb 2013 and then on 26 feb 2013 will leave for india. Do I need again visa to enter Canton from macau. I have single entry visa for china valid for three months.