On 144 Visa Free itinerary SG -> HK -> Macau --> Shenzhen --> HK -> SG

Hi can i check on the 144 hrs visa free

is this valid if i fly this way

i will fly from Singapore to Hongkong.
In hongkong , take a Cross-Border Bus to Macau do a day trip , from Macau will take a Cross-Border Bus to Shenzhen, stay 2 night at Shenzhen, from Shenzhen take a Cross-Border Bus back to hongkong stay for 2 night, then from Hongkong Fly back to Singapore