A hunting arrow for tracking target animals is disclosed and described. In the first step, an entire upper surface of the sapphire substrate is coated with a first nitride semiconductor layer, while supplying oxygen. The module includes a combination anchorair brake, a buoy, and a mooring line. Preferably, an air filter unit includes such a processed filter medium and a frame body holding the processed filter medium. The fluorescent powder layer and a substrate form a closed cavity for accommodating a chip on the substrate, the cavity is vacuum, and the effect of distant fluorescent powder coating can be achieved.