GB/T 43610-2023 focuses on the determination of the apparent growth direction of linear crystals for analytical electron microscopy in microbeam analysis. This standard explicitly uses transmission electron microscopy and describes its determination principle in detail. Specify the requirements of instrumentation and equipment, the preparation process of samples, such as slice thickness, surface preparation, etc. During the determination process, the setting of electron beam parameters, image acquisition and Data analysis methods are also specified. According to this standard, the apparent growth direction of linear crystals can be accurately determined, providing key technical support for material research, crystal growth mechanism exploration, etc., and assisting scientific research and production in related fields.