I wanna get some advise here,

I work for my company more than 5 years. Recently i just pass my resignation letter to my HR dept, notice is 2 months earlier.. on 01/01/2013, i pass my letter and my resignation date is 01/03/2013... what my question is, i want to clear all me annual leave before leave my company.. i still have about 16 days annual leave... i plan to clear it off (plus my 2 off days per week) so i cant stop working before CNY. But the HR mention that they have RIGHT to not approved my annual days..

It is truth? or i have my rights to clear off all my leave?