Traveling from Philippines back to Mainland a few days later, then go to Hong Kong for play 2-3 days and afterwards leave Hong Kong and return to Philippines.

In this scenario, you’re a Filipino citizen who:

1. Returns to the mainland from Philippines.
   
2. Spends a few days (less than 7-14 days) in China before leaving for Hong Kong.
   
3. Arrives in Hong Kong and spends 2-3 more days there.
   
4. Leaves Hong Kong and returns back to Philippines.
   

In this case, you would need a transit visa, also known as an M-visa (Transit Visa), which is required if your stay in the mainland exceeds 7 days or less than 14 days. Since you’ll be spending slightly over 2-3 days there, it’s likely that you will not trigger Hong Kong immigration regulations for this initial entry.

However, when departing from Hong Kong back to Philippines, as a Philippine citizen and passport holder, you would need an Exit/Departure Levy (EDL) of HKD130 (approx. PHP1,000-1,500). This is in addition to any applicable taxes on goods or services purchased during your stay.

Please note that regulations can change; always double-check with Hong Kong Immigration Department and relevant authorities for the most up-to-date information before planning your trip.