The arrowhead is a tuberous vegetable from China which is only available during Chinese New Year as it's a seasonal crop. It's also known as Chinese potato because it tastes like potato when cooked with chicken.
The arrowhead was cleaned, peeled and sliced as shown in the above photo. Then soak the arrowhead slices in the water before frying. Transfer them to a tray to strain the water.
Dip the arrowhead slices into a wok with hot boiling oil. Stir for a few minutes.