The Nine Month (detail) from the Activities of the Twelve Months series, anonymous court painter, Qianlong reign (r. 1735 – 1796). Note the Yixing side-handle kettle and Yixing teapot; the brewing methodology already closely reflects contemporary Gongfu practices by mid-Qing Dynasty.
Editorial Conversation: Book 2 - Chapter 3, Section 4: Qing Dynasty Yixing History
Master of Ceremonies here on Tea Technique.
Elsewhere, Founder & former CEO of Analytical Flavor Systems.
Previously, Founder and Executive Director of the Tea Institute at Penn State (defunct).