Xianlian is not washed with water and directly dried on the line. Note that the firepower should not be too large and must be turned frequently. When it is dry and easy to break, the hot sand is thrown into the tank to crash into silt, fibrous roots and residual petiole, which is a dry product. Per acre can produce dry goods 75 ~ 125 kg, high yield up to 250 kg. The fibrous roots and leaves are dried to remove sediment impurities and can also be used medicinally. Residual petiole and fine residue sieve can be used as veterinary drugs.