I want to say that you'd better not buy it online! There are too many fakes online! The agent of Yamaha factory is very strict! Cross-shipment is not allowed! (Off-site sale) So online sale itself is not allowed by the factory! You can check your local agent on Yamaha's homepage. Ask them to buy it, although the price can't be cheap. But at least it's true! The serial number of the product itself and the certificate of those instructions can be forged. I once met a customer who bought Yamaha online and was sold by a local teacher (presumably by a fake method). After he sold the box to the students, he left all the instructions of the box. Put the fake goods in, and marked the serial number of the original product and sold it to my customers! My customers have no problem finding Yamaha factories or agents. I thought there was something wrong with the piano, so I helped him check the sales channels of the piano. Finally, I found the teacher. After I found him, he immediately called my client, assured him that it was not fake, and said that you don't want it, just give it back to me. Although I finally quit the piano. But you know what's suspicious about this, right? I suggest you don't get involved in this muddy water, especially the products of brands that are not allowed to be sold in different places in this factory.