I just got married to chinese girl. Confused about the bridal payment.

I just got married, we didn't have any ceremony, just fixed documents in china. We decided to have ceremony in Lithuania. Week later i come back to Norway "i work here permanently" anyway i had a chat with my wife, she told me that i have to pay her parents "betrothal gift" other words bridal price to her parents. Can anyone clarify to me that. I have read few things about chinese traditions and customs, but somehow i didn't catch the fact about bridal payment.........