Tang Emperor Xuanzong admired Zhang Guolao, a Taoist, for his magic arts which were supposed to enjoy eternal youth,and often received Zhang in the Huaqing Palace. Later Emperor ordered the construction of Guolao Chinese Herbal Hall where Zhang could study his Taoist and alchemy to make elixir of life, which would help emperor live forever. Now the Hall has changed into a herbal drugstore for tourists. |