Finally, I am able to get my self a bottle of Disaronno Originale. I tried to get it from Beijing Airport but failed. They said they are not selling any Italian liqueur. I was asking help from friend's friend who was on the way back from UK. They managed getting it from their airport. I just received it this evening. I heard from my friend that this liqueur is one of the ingredients for Tiramisu. Now I just need to arrange an appointment with my friend for teaching me on how to make Tiramisu with this liqueur.