The first sound trademark was registered in China on May 14, 2016, in class 35, 38, 41 and 42 under No. 14503615, by China Radio International.
A sound mark can only acquire distinctiveness through long-term use. The applicant may be asked to submit evidence of use and explain during the examination process how the trademark acquired distinction. Furthermore, the trademark applicant should pay attention to keeping evidence of use during daily operation. For example, if the trademark is used in a television advertisement, the contract and invoice for producing and publishing it should be kept as evidence of broadcasting.
Source: DEQI Intellectual Property Law Corp., China.