$BTC Old Zhang hid the candy given by his grandson in an iron box, saying he wanted to "save it for later." The grandson, curious, sneaked a peek and found the box full of melted candy—turns out grandpa had lost all his teeth and could only save them for when he came, peeling one by one to feed him. That day, old Zhang trembled as he took out the last piece of candy, and the grandson suddenly snatched the candy wrapper, imitating grandpa's manner from years ago, saying: "Good boy, open your mouth."