Does Irish/ Filipino Passport need visas and separate visas for HK, Macau and Shenzhen

Hi there. I need your advice. My gf (Filipino citizen) and I (Irish citizen) both working in Singapore will spend holiday in hk for a week, whole day in Macau and a whole day in Shenzhen. Does both of us need visa? Also, should we apply different visas for each country? What kind of visas should we apply? Thank you