Can I use my single-entry L visa to visit Hong Kong, Xiamen and Macau?

hi, i have L type visa single entry. will travel on 22nd dec to china my flight bom-hkg-xiamen. i reach hkg on 9 am morning and my flight to xiamen is on 17.30 pm arround after 8 hours. can i visit hkg city on same visa? after visit hkg take flight to xiamen and same visa use for xiamen entry? no prb?and if i want visit macau on 22nd and stay 2 days in macau after catch flight for xiamen is possible?