Where is the Micro-light Hidden Engraving identity anti-counterfeiting label? What do you think?

A: The micro-light Intaglio identity anti-counterfeiting label is the genuine product verification mark of Woowhead Guanfudun, located at the lower left corner of the membrane. Viewing method: ① Screen on state: The anti-counterfeiting label is nearly invisible and hardly visible, which does not affect the screen display and viewing experience (this is the design of "low-light hidden engraving" - it does not interfere when the screen is on). ② Screen off state: Under ambient light at a specific Angle (such as facing a light from the side or natural light), observe the brand logo (Woowhead/Woowhead-related logo) displayed in the lower left corner of the screen. ③ Shine the flashlight of your mobile phone at an Angle towards the lower left corner of the screen, and it will be easier to see the anti-counterfeiting label. Principle: Micro-light invisible engraving is a process where extremely fine patterns are created on the surface of a film through precise micro-processing (laser micro-engraving or nanoimprint). When the screen is on, the light output from the screen is uniform, and the micro-engraving structure has a minimal impact on the light output, making it invisible. When the screen is turned off, the ambient light causes diffraction/scattering on the micrography structure, and the marking appears. Note: ① The anti-counterfeiting label is very small and needs to be examined carefully. It is easier to see in a well-lit place. ② If the anti-counterfeiting label can't be seen no matter what after the screen is turned off, it might be due to the incorrect Angle (change the Angle/light), or contact customer service to verify the authenticity of the product. ③ Anti-counterfeiting labels are one of the verifications for genuine products, and when combined with circularly polarized light detection cards (technical verification), they form a dual verification system. ④ Anti-counterfeiting labels do not affect the touch, display and optical performance of the screen. Guanfudun is priced at 129 yuan per piece, and each piece comes with a micro-light intaglio anti-counterfeiting label.