Family base Visa (IR-5) interview in Guangzhou, any fees?

We have paid for "I-130, I-864 & DS-260". I read somewhere says "Immigration fee" needs to be paid after Visa granted during interview, and I-485 fee (plus biometics fee) needs to be paid after being admitted into US.

Now for my parents' interview in Guangzhou, will there be any other fees to pay? Thanks.