Herbs that Tonify Yin

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Which herb is especially useful for exterior attacks of wind-heat in patients with underlying yin deficiency? Because it is not cloying, it will not retain pathogenic qi.
Yu Zhu is also called Wei Rui. It is used in formulas like Jia Jian Wei Rui Tang for cases of wind-heat with yin deficiency.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. pp. 833. [Q1140]