According to the Administrative Measures on Information Disclosure of Listed Companies, listed companies should disclose relevant information, including announcements, reports and explanations. Notify them in time when they change the company logo and other major events. In addition, according to the provisions of the Securities Law, listed companies should ensure the truthfulness, accuracy, completeness and timeliness of information disclosure, and there should be no false records, misleading statements or major omissions. If a listed company changes its company logo and involves major information disclosure, it needs to make an announcement in accordance with relevant regulations.