Router is at the address ending .254 on network

Hello, fellow networkers, if I may I would like to ask a question.

I have a homework to create a B class network.

I've assigned two networks of IP's 128.1.0.1 and 128.1.0.2 with SUB of 255.255.0.0

Then I forgot that I saw that in the requirements was this requirement but I don't really know what that means : Router is at the address ending .254 on network

What is this supposed to mean?

Thank you very much for any help and feedback, have a nice weekend guys.