no website on file — from open-source research, nothing to check against
Brand 'Laotongzhi' from 云南海湾茶业 — one of the top 10 pu'er brands; founded by Zhou Bingliang (pioneer of shu-puer 7572 technology) and Lu Guolin, code 8 in the meihao system.
website not found; founding brand — former directors of Menghai Tea Factory
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.