<p>Zong said, &ldquo;In the Gu Fang and Shen Nong Ben Cao Jing, there is only Zhu, and no differentiation between Cang Zhu and Bai Zhu&rdquo;. According to Tao Hongjing, there are two types of Zhu, one being Cang Zhu and the other Bai Zhu. Later, doctors preferred the usage of Bai Zhu to Cang Zhu. China produces two types of Zhu &ndash; Cang Zhu and Bai Zhu. Considering Cang Zhu is more effective at disinhibiting water, I prefer to use Cang Zhu. Japan produces Zhu, but both the quality and the effectiveness are poor. Zhu should be grated before use.</p>
