Tangshan Huida, Help Me Identify this Fill Valve | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Fill valves are never an issue for me, they are about as easy to replace as anything in a toilet. Even a newbie like me can do it.

Fast forward to today when I came across this specific fill valve. I can not identify it, and I cannot replace it.

What is it? It says Tangshan Huida Anti Siphon on it