① Look at the brightness of the surface. The coating of regular products has specific process requirements and has passed the neutral salt spray test, and there is no rust phenomenon within the specified time limit. So when choosing, it is important to pay attention to the surface gloss, and touch without burrs, pores, or oxidation spots.

② Gently rotate the handle to see if it is lightweight and flexible, and if there is any obstruction or weight. Some very cheap products use high-quality valve cores, but their technical coefficients do not meet the standards, and their prices differ by 3-4 times. So when choosing, do not set the price as the only criterion.

③ Check the various components of the faucet, especially the main components, for tightness and no looseness.

④ Identify product markings. Generally, legitimate products have the brand logo of the manufacturer to identify and prevent counterfeiting. However, some non-standard or inferior products often only have paper labels attached, or even no markings.