Jim
Liu Bao is from Guangxi. Liu An is from Anhui, and in the recent years from Guangxi as well.
Liu Bao is processed from tea varietals found in Guangxi, fermented first in loose leaf and then pressed into baskets, sold as loose leaf, or compressed into cakes as Oleg bought his.
Liu Bao comes in 2 disctinct forms, the small leaf and large leaf varietals. Basically the taste is similar. The taste is sweet, nutty with a hint of woodiness.
Liu An is produced in Anhui. Those produced in the city of Liu An is called Liu An Tea, those produced outside of the city area but in Anhui is called An Cha, or An Tea.
The varietals for this tea are from the green tea plants in Anhui.
The tea is processed as green tea, and while it is hot, pressed into baskets, re-steamed and then dried on low heat. This tea is kept for sometime to allow post fermentation before drinking it.
This tea is virtually not known in China, becuase it is another of the accidental tea that turned 'black' from transportation to immigrants overseas - in the old days, the people from Anhui were well known merchants and traders who travelled throughout the country and overseas. The green tea they brought along in baskets fermented and create the unique taste they came to like. Hence Liu An Tea is almost unheard of in China, but the immigrants in Hongkong, Taiwan and south east Asia are familiar with it.
In the recent years Guangxi factories adapted the methods from Anhui and produced their own Liu An tea.
Danny