Because she bought the copyright, Tang Yi's cover songs were not infringed. Tang Yi's live singing is not infringing. Infringement means that the original labor results of the parties are plagiarized and stolen by criminals. As long as Tang Yi's live songs are not suspected of copyright disputes, they do not constitute infringement. If Tang Yi's live songs are restricted by copyright and can only be sung by the parties themselves, then Tang Yi's live singing is suspected of infringement.