1. Appearance inspection: The real Harbin vernier caliper has fine appearance craftsmanship, smooth lines, clear scales, strictly symmetrical scales, complete and clear markings, and no burrs, dotted lines, blurring, etc. Counterfeit and shoddy products usually have rough workmanship, unclear scale lines, different line thicknesses, irregular markings, burrs, dotted lines, blurring, etc.

2. Material inspection: The real Harbin vernier caliper is made of excellent material, has a long service life, and is not easy to rust, deform and fall off. Counterfeit and shoddy products usually use inferior materials, have a short service life, and are easy to rust, deform and fall off.

3. Measurement and inspection: The real Harbin vernier caliper has high precision and the measurement results are accurate and reliable. You can check its precision and accuracy by making measurement comparisons or comparing them with genuine products.

4. Trademark inspection: The trademark on the genuine Harbin vernier caliper is clearly visible, the trademark font is neat, and there are no typos, distortions, blurs, etc. Counterfeit and shoddy products often have trademark problems, such as misspellings of trademark names, irregular trademark fonts, deformed trademark patterns, etc.