Where did the term "China Rails" come from

Oldmanmopar said
lifter valley ends are referred to as the china wall, The fillers used to extend them were referred to as the china rails.

In a few books the term “China wall” was used and from what I remembered as what I wrote. I’ll check the books and re read.

Here is a post from you in another thread. Richard, Your disagree was just a asshole shot. But I get it. I found the treasure. LOL

Ummm, Oooooooo kay! I don’t know what you mean here and it’s weird.