1. Cotton Tree Guitar is a famous brand product in Guangdong Province. Cotton tree guitar once occupied an important position in China guitar production, and had a great influence in the whole music industry in China.

2. Tang Nong donner is a musical instrument research and development, manufacturing and sales brand, which was born in 213 and its headquarters is in Tennessee, USA. Founder Gideon officially confirmed the registered trademark of Donner under his family name. The brand covers a variety of musical instruments: acoustic guitar, electric guitar, ukulele, electric bass, electronic drum and electric piano, as well as a series of effects and speaker products. It is a brand of research and development musical instruments that pays attention to product innovation. These two brands are not the same brand.