Changan sued BYD. In September 2022, BYD stated that it had submitted a trademark objection application related to "BYD DM-i" to the Xi'an Changan Trademark Registration Bureau, and the application has been accepted and reviewed. Previously, Changan Automobile stated on its official Weibo that Changan Automobile recently received a letter from an infringement lawyer regarding the rights and interests of INFININT, the source of the "BYD S6" product. The lawyer's letter stated that BYD Auto Industry Co., Ltd. and Guangzhou Shicheng Advertising Co., Ltd., the advertiser of BYD S6, were suspected of infringing Changan Automobile's intellectual property rights.