THERE are three broad categories of China tea: green, black and oolong. Green tea is unfer-mented, and grows best in Zhejiang. According to Traditional Chinese Medicine it relieves internal heat. Black tea is fully fermented and said to invigorate the functions of spleen and stomach. The best grows in THERE are three broad categories of China tea: green, black and oolong. Green tea is unfer-mented, and grows best in Zhejiang. According to Traditional Chinese Medicine it relieves internal heat. Black tea is fully fermented and said to invigorate the functions of spleen and stomach. The best grows in