<p>Chai Hu can be found anywhere. Chai Hu produced in Yinxian is the best quality. The roots and top should be removed, wiped and grated.</p>

<p>I have read that one should investigate the fragrance of Chai Hu and found only young Chai Hu had a strong aroma. Zhang Yuansu said, &ldquo;Old Chai Hu is light in both qi and flavour.&rdquo; I use Liancang Chai Hu with confidence.</p>
