no website on file — from open-source research, nothing to check against
Premium Yixing zisha brand; unique firing techniques "shell firing", "iron-bone firing", "purple smoke", full manual production cycle.
website not found; focus on collectible and museum-grade pieces
The source export carried a verification date of 2026-08-16 — later than today, so the check could not have happened. The mark was removed; the original value is kept in the data.