Be the apple of someone's eye
In apple-pie order
Bring home the bacon
Be full of beans
Spill the beans
Take the bread out of somebody's mouth
That takes the biscuit!
薑是老的辣: "Nature like ginger, the older it gets the more its pungency increase" -- The older, the wiser.
畫餅充饑: "Draw a cake to satisfy one's hunger" -- A Barmecide feast.
緣木求魚: "Climb up a tree in search of fish" -- Do the impossible.
蓮子蓉口面: "A face like lotus seed paste" -- A happy face. (Cantonese)
大頭蝦："Big headed prawn" -- A careless person. (Cantonese)