The way tax works here is the HKIRD want a years worth of your tax in their pocket so your first year in HKG you have to pay the current tax you owe + next years tax they think you will owe. The second year in HKG they already have the tax they thought you would pay for that year which is usually not enough so you pay the remainder of the tax for the second year plus what they now think you will owe for the 3rd year based on your 2nd year tax.
Basically the 1st year you pay tax for 2 years and then it is about 15% a year after that.
We all spend a lot of time in HKG, you don't need to convert to US$ to help us understand the value of the HK$.
