You're kidding! Hehe, this is also tested by a special testing agency! General testing institutions mainly test those chemicals in leather to see if the content of some chemicals exceeds the standard! Because the EU is now more and more strict with China's leather green barriers, and China's own environmental awareness has been strengthened! I can identify true and false skin for free! I graduated from Shaanxi University of Science and Technology majoring in leather! Genuine leather smells like burning hair, while artificial leather doesn't! Dermal fiber is natural and fake skin is synthetic, so taste is also a test method! In addition, the middle leather has many reverse sides that can be clamped with nails. If you can pull down a slightly thicker fiber, it is genuine leather, whereas if it is as thin as a silk quilt, it is synthetic leather!