Still on lettuce, I should mention that we do get what I, and probably you, think of as 'regular' lettuce. Sadly, only one type.
Romaine or Cos lettuce. Lactuca sativa L. var. longifolia. I do like the Chinese name. Just as 'whisky', derived from the Gaelic 'uisgebeatha' literally meaning ‘water of life’, the Chinese name for this lettuce is 生菜 (Mand: shēng cài; Cant: saang1 coi3), meaning ''vegetable of life' (literally 'life vegetable').
I'm not sure how long you could live on just whisky and lettuce, though.
Like most of the preceding veg, this is usually served wilted with garlic and oyster sauce, but rarely raw. It is also used in noodle or wonton soups.