Let You Make Toys, What's Going on with Two-Way Foil?

Project 1: Develop a toy train. Requirements: Sci-fi and dynamic appearance. Toy Train Speed: No requirements. Sun Hang traveled through Blue Star, bound the toy black technology system, and became a toy designer. He received a task assigned by his leader at the beginning. Sci-fi action? Streamlined shape? No speed limit? Ever since, Sun Hang designed a toy locomotive with a bullet-head aerodynamic design full of science fiction. The speed is set at 350 kilometers per hour. It was also named "High Speed ​​Rail". On the day of project acceptance, the entire venue was shocked! The top leader of the Railway Academy: "Sun Hang, you've already reached a speed of 350 kilometers per hour, and you still tell me this is a toy?" Project 2: Develop an artificial intelligence postcard toy. Sun Hang learned from his experience and developed an unpretentious postcard. Named "Dimensionality Reduction Toy, Postcard Two-way Foil" The whole world is boiling: "I asked you to make a toy, what's going on with the two-way foil?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.