1. There will be a clear trademark mark on the base of the genuine brick body, while the mark on the fake one is very blurry; 2. Listen to the sound, the sound made by knocking on the authentic brick is very crisp, and the fake one is very muddy; 3. The real brick body has a clear trademark mark. The Sman magnetic ring has a high density and is relatively heavy when weighed, while the fake ones are lighter; 4. The genuine packaging box has a clear manufacturer's phone address, product model, color number, production date, etc., and it is very clear. The fake ones are very vague.