Lui Cha (擂茶) is an iconic Hakka rice dish that is topped with chopped leeks, long beans, kale
(kai-lan),
mani cai, string bean, cabbage, beancurd
(tau kwa), pickled radish
(cai pok), and served with a bowl of grinded tea made from a selection of herbs such as basil and mint.
Well, there might not be any hard and fast rule stipulating what vegetables to be used in the making of this dish as I believe the Hakka womenfolk simply used whatever vegetables they have on hand or had growing in their backyard at that moment.