Not in the same class, the China famous trademark of Jiadewei Piano is valid for 10 year, protected by international law, and China's export volume ranks second in the country.

Helen Piano China well-known trademark is valid for 5 years and is not protected by law. The export volume of domestic brand China is 0/3 of that of 65438+ Guardian.

China General Administration of Light Industry can inquire whether the information is true or false.

The performance-price ratio of Guardian Piano GM30 is better than Helen HU 12 1.