Coming? (a) The palm of one hand is downward, from outside to inside.
(2) Straighten your thumb and little finger with one hand, move forward, and then eat, indicating "here".
Children? Stretch one hand horizontally, palm down, and press down slightly on the chest (depending on the height of children and teenagers)
Heaven and earth? Hold out your index finger with one hand, point, heaven and earth.
Exhibition hall? (1) Put your fingertips up, put your palms flat, and move from the middle to the sides one by one.
(2) Hands are ""shaped.