This leafy vegetable is a close relative of “Pak Choy / Xiao Bai Chye” but its stem is white and leaves are light green in color. It have a unique characteristic whereby it will “shrink” substantially after being cooked. Hence, it has a very interesting nickname called as “Wife beating vegetable” or “打老婆菜“ (as the husband thought his wife have secretly eaten the vegetable after cooking it)