You will only need to pay your PolyU tuition fee. You will not need to pay any additional tuition fees to your host university.
However, you will need to budget for the following costs:
- Return flight tickets
- Visa application fees
- Personal expenses (meals, laundry, transportation, etc.)
- Activity fees (required by some partner universities)
- Textbooks and stationery
You should also check your host institution's website for more information.