in south korea, it is inappropriate to call the attention of someone with a palm-up arm wave. instead, the proper way to wave to someone or call for attention is to wave vertically, making sure the palm of the hand is in a downward position. it is not uncommon to see waving among the younger population (in south korea) to display their departure rather than bowing, which is the traditional way of greeting one another. waving the hand outward towards the face is also used to grab the attention of a pet or child.