The instant tea, the further developed form of tea which is called national drink, is accepted and welcomed by an increasing number of consumers because of its convenience, nutrition, health and good taste. Instant tea is always made of instant tea powder and therefore instant tea powder is the essential raw material of making instant tea. China is the major country of producing tea powder. however, our instant tea industry is hampered by the low yield rate of instant tea powder, the dim armor and low resol...