See if there is a scent of fragrant fir after sawing. If there is old wood or a strange smell inside, it is a fake. There are too many fakes now. It is necessary to recognize the four words "Green Field and Fragrant Cedar", and there must be a registered trademark behind them. Also look at the anti-counterfeiting code on the trademark. If there is no anti-counterfeiting code or the anti-counterfeiting code cannot be entered, it is a fake. This is what we use at home, and the carpenter said it is very useful. The inside of the saw is also beautiful.