Die Menschen sind in der Lage, die Selbstreflexion seit der Antike zu sortieren. Am Anfang wurde Wasser alsSpiegel. From the Yin and Shang Dynasty to the Tang, Song, Yuan, Ming and Qing Dynasties, the Spiegel for self-reflecting evolved into a bronze Spiegel. The earlier glass Spiegels in China appeared in the Ming and Qing Dynasties. It was brought from Europe by missionaries who came to China. This European-style glass Spiegel has to go through tens of thousands of miles of sea roads and bumps all the way. Taking into account the fragility, the Spiegel surface is generally narrow and easy to carry; the Spiegel is mostly used for shaving and shaving, and the Spiegel surface is only enough to shadow the partial beard.Then, with the passage of time, the silver Spiegel used by most of us came into being. With the development of technology, the function of the Spiegel is only self-reflection, it is more intelligent and more humane. More functional, such as: anti-fog, watch time, measure temperature, watch TV, etc. The material of the Spiegel has also been upgraded from a silver Spiegel to an "environmental protection Spiegel". This Spiegel uses lead-free paint, which is a technical breakthrough of silver Spiegels. This kind of Spiegel is called a lead-free and copper-free Spiegel, also known as an "environmental protection Spiegel.