Originally Posted by
ruirui
well, the fork is not cut yet. when i bought the frameset, it comes with the ritchey headset, but they forgot to ship it. now i just received all the missing part, so trying to piece it together.
see the photo of all the parts for the headset. the one they sent me is the press-fit version, so everything should be there. just the pressfit part won't go into the frame easily..

Leaving aside why you are building from scratch when you don't know what parts of a headset go where and how they should fit, why on earth are you not requesting assistance from the source that provided you both the frame and the headset? One should ALWAYS go to the supplier of an item when there is a suspicion that what is supposed to be compatible or complete is not.