BANK OF CHINA for international money transfer fee?

Hi all i wanted to ask what fee takes BANK OF CHINA for international money transfer ? I sent them Q but they do not reply. I’m from Lithuania (bank: Swedbank (i payed 55 LTL for international transfer)) and want to transfer money. One time i done this, i got to sent 180$ and person got only 155$ . So i want to know they take standard 25$ fee or there is a fixed sum from amount? Please help me with full details.