Already in country with single visa but want to see Macau or Hong Kong before I leave

Hello, I am an Indian citizen. I was only allowed a single entry visa to get here. I want to fly to Macau or Hongkong then return to China (Guangzhou) and fly back to India the next day. my flight leaves Guangzhou to India on May 31st. Is it possible to fly to another country during May 26-29 then apply for a 72 hour or 144 hour free transit when I return to China? Thanks for your help.