Yaoqing
Definition
The leaf-bruising and tumbling step in oolong production that breaks edge cells to initiate controlled, partial oxidation. The rhythm of yaoqing largely determines an oolong's aromatic character.
Why it matters
Yaoqing, literally "shaking the green," is a defining stage of oolong processing. Withered leaves are tumbled in bamboo baskets or rotating drums, gently bruising the leaf edges so that oxidative enzymes contact polyphenols only at the perimeter. The leaves are then rested between tumbles, allowing oxidation to proceed in stages. This alternating cycle of agitation and rest, often repeated through the night, creates the classic oolong leaf appearance of a green center with a red edge ("green leaf with red rim"). The interplay of cell rupture, oxidation, and aroma development is what gives oolongs their extraordinary aromatic range, from green-floral Tieguanyin to roasted-fruit Wuyi yancha. Yaoqing is one of the most skill-dependent steps in tea making. Experienced masters judge intensity and timing by leaf temperature, scent, and pliability, adjusting in real time to weather and leaf condition.