3 to 9 grams. Decoct, or grind and swallow, 2g at a time, twice a day. Shizhu generally refers to Shizhu Tujia Autonomous County. Shizhu Tujia Autonomous County belongs to Chongqing. Located in the south bank of the upper reaches of the Yangtze River, in the east of Chongqing, and in the center of the Three Gorges reservoir area, it is one of the Tujia settlements where Cubans are the main body and other ethnic groups live together.