From the teafromtaiwain website, "Da Yu Ling is located on Mount Li (Li Shan or Pear Mountain)
". So I guess both Da Yu Ling and Li Shan come from the same mountain, but different elevations. I also noticed that the Da Yu Ling liquor is darker and more brown than Li Shan, so I'm assuming they use different fermentation levels.
"Two of the most famous of the Alishan tea areas are Zhong Shu Hu and Shi Zuo.
" So are those two considered to be the same as Alishan Oolong, but with more technical names, maybe referring to the exact plantation area within the region or fermentation level? Many vendors list "alishan oolong", but there is no "alishan" on the teafromtaiwan website (although they have Zhong Shu Hu and Shi Zuo)
Similarly, "Tsuei Luan" comes from the Li Shan region, so is it the same as "Li Shan Oolong" that other vendors sell?
I also just noticed that Alishan and Li Shan are quite far apart. For some reason I thought they were next to each other.