3D Metal Pen: The liquid metal 3D stylus designed by Zhichuang combined with the technology of Dream Ink can directly write circuits or patterns on different base surfaces. The liquid metal 3D stylus is mainly used for electronic cultural creativity, DIY personalized circuit production, real-time verification of circuit design, electronic circuit teaching, etc. Compared with traditional circuit board manufacturing, liquid metal electronic pens are simpler and more environmentally friendly. In the past, the circuit board was laid with a copper mold on a substrate material made of silicon and then etched according to the drawn drawings, which not only took time but also polluted the environment. The liquid metal electronic stylus can easily write out the circuit that originally required multiple processes to complete. Smart design combines its free and individual use environment, written gestures and angle ergonomics, and safety first protective measures as the starting point and breakthrough point of the design. The pen body is all of a metal shell. The heated part of the pen tip has a hand-blocking position. The hand-blocking position and the hand grip are integrated and embellished with textured patterns. It not only achieves a simple appearance design, but also has the functions of shockproof, durability, heat resistance, finger protection and hand feeling increase. It is truly simple but not simple.