The following is the method for identifying the authenticity of KD13:

1. Shoe box label: On genuine KD13, the shoe box label should be exquisite and clearly printed. There will be the "Nike" trademark and the "Made in China" logo at the bottom of the label. The font on the label should be clear, without blur or glitches.

2. Shoe box: The shoe box of the genuine KD13 should be made of hard cardboard with good texture, with a certain thickness and weight, and obvious unevenness on the surface. The shoe size, color and other relevant information is usually printed on the inside of the shoe box.

3. Upper: The upper of the authentic KD13 should be made of high-quality synthetic materials, with a comfortable feel and obvious texture. The pattern on the genuine shoe should be clear and not smudged or blurred.

4. Shoelaces and shoe buckles: Genuine KD13 shoelaces and shoe buckles should be clear, without rough edges or color differences. The "KD" logo on the shoelaces should be clean and neat, without smudging or blurring.

5. Soles: The soles of genuine KD13 shoes should be made of high-quality rubber, with uniform color and clear printing. The pattern on the sole should be clear and not smudged or blurred.

6. Internal labeling of shoes: The internal labeling of genuine KD13 shoes should be meticulous and look textured. The writing on it should be clear and there should be no falling off or unclear printing.

7. Size and shoe box size: The size of the genuine KD13 should be consistent with what is marked on the shoe box. If you find that the size or markings on the shoe box do not match the shoe, it is likely a fake.

In short, when identifying whether KD13 is authentic or fake, it is necessary to carefully observe and compare all parts of the shoe, especially the shoe box, shoelaces, soles and other parts. If you are not sure whether it is genuine, please go to an authorized Nike store or official channel to purchase it.