never heard of terror infinity do I need context for the fanfic or is it mostly explaimed?

It is mostly explained but you can read about it on the wiki. Just search there for the name "zheng zha" and you will get a basic idea of the novel. My story has already deviated from classic terror infinity already, so no need to worry too much, I am just using it as a kind of template, though it is definitely more than just "a simple template".