What's wrong with the secret seal of the Palace Museum built by the painter?

Anti-counterfeiting purpose. The secret seal of the anti-counterfeiting seal of the Palace Museum stamped by the painter can present a specific pattern, text or color under a specific light source or detection instrument, thus achieving the purpose of anti-counterfeiting. Beijing Palace Museum is a comprehensive museum in China, which was established in June 1925+ 10/0. Located in the Forbidden City in Beijing, the collection includes but is not limited to the Ming and Qing Dynasties.