1. There should not be any food or drink in the PCBA work area, smoking is prohibited, no sundries that are not related to work should be placed, and the workbench should be kept clean and tidy. 2. During PCBA patch processing, the welded surface should not be taken with bare hands or fingers, because the grease secreted by human hands will reduce the weldability and easily lead to welding defects. 3. The operation steps of PCBA and components are reduced to a minimum to prevent danger. In assembly areas where gloves must be used, soiled gloves can cause contamination, so gloves must be replaced frequently when necessary. 4. Do not use skin-protecting oils to coat hands or various silicone-containing detergents, as they can cause problems in solderability and adhesion of conformal coatings. A specially formulated detergent for PCBA soldering surface is available. 5. Components and PCBA sensitive to EOS/ESD must be marked with appropriate EOS/ESD marks to avoid confusion with other components. In addition, in order to prevent ESD and EOS from endangering sensitive components, all operations, assembly and testing must be completed on a workbench that can control static electricity. 6. Regularly check the EOS/ESD workbenches to confirm that they can work normally (anti-static). Various hazards of EOS/ESD components can be caused by incorrect grounding methods or oxides in the ground connection parts, so special protection should be given to the "third line" grounding terminal joints. 7. It is forbidden to stack PCBA, otherwise physical damage will occur. There should be various types of dedicated brackets on the assembly work surface, which are placed according to the type. 8. In PCBA patch processing, these operating rules should be strictly followed, and correct operation can ensure the final use quality of the product, and reduce the damage of components and reduce the cost