Re-Entry in China (Guangzhou) after visiting Macau for 3 days.

Hi, I have got Single Entry M Type visa for China. During my 9 Days trip to China (Guangzhou) I am planning to spend a 3 days weekend in between in Macau & Hong Kong and return back to China (Guangzhou) for last 3 days of the trip, as I have flight from Delhi-Guangzhou-Delhi. Would I be allowed to re-enter in China after visiting Hong Kong and Macau? Please help as I need to make reservations accordingly. Thanks.