I was a student and then a trainee in Hong Kong last year. I am back in France and I am planning to come back to Hong Kong to work in September.

But First, I am doing some calculations in order to evaluate precisely my real salary.

So, I will have a plenty of questions on which I can't find accurate answers.

What is the way to calculate the taxes on salary? (I went on the governemental website but, my results was far away from the estimation of my local friends)

How french citizens do for their social security? How can I have a complete health protection?

How can I prepare my retirement salary? (Is it clear?)

Are there any annual taxes for the rent of a flat?

How do we negociate the salary with the company? Do I have to negociate my holidays, a round trip ticket back to France? What are the rules?

I hope you will help me.