It is produced by Yizhong Tobacco Company.

Qingdao’s well-known brands have six brands: Precious One Pen (50 yuan/box), Gold Medal One Pen (30 yuan/box), Noble One Pen (20 yuan/box), and Luxurious One Pen. Pen (10 yuan/box) Hongtu Yi Zhi Pen (10 yuan/box) Upstart Yi Zhi Pen (8 yuan/box)

They call it Yi Zhi Pen. I’m afraid no one knows the reason.