According to media reports, Apple is using 3D printing technology to make the shell of part of the upcoming Apple Watch Series 9。This manufacturing process can save a lot of metal materials required by traditional CNC machining, while reducing production time。If Apple can successfully use 3D printing technology to produce some devices, it can improve production efficiency and reduce costs。Guo Mingxuan said that if Apple's production of the Apple Watch in 2023 goes smoothly, 3D printing technology will be applied to more devices in the future.。