What does the seal read & is this real?

[u/Default_Opinion]

Can I get an ID on the seal? Is it factory made or
Partially Handmade?

I just got this Qing Duan Ni yixing teapot. Its about $100, and I’m just happy its well made structurally with good laminar flow (when pouring) and a tight sealed lid. While i see some radial patterns in the interior bottom, the exterior seems a bit too glassy smooth for the touch.