Second, what express delivery needs to inspect is whether the goods are damaged. If the appearance is not damaged, the courier company will not assume other responsibilities. So, if you want to try the problem that the electronic organ doesn't work, just go home and try it. If it doesn't ring or it's noisy, then contact the merchant to exchange the goods. These are all within the scope of warranty, and international companies like Yamaha will actively take responsibility.
Whether the merchant provides the invoice, if so, you can check the authenticity of the invoice.
Then check whether the supplier's home is a regular agent through Yamaha official website.
Nothing else.
Taobao merchants are afraid of bad reviews and complaints. If you have problems, you can complain about Taobao. If you can't solve them, you can complain about Yamaha.