You can check it on China Trademark Network. This is official website. You can use it safely. If you want to register a trademark, click "trademark approximate query", enter the trademark classification number, query method and content, and click automatic query. If you want to inquire about the status of a trademark, click "Trademark Comprehensive Inquiry" and enter the trademark registration number or trademark name, or the trademark applicant, and you can inquire. In addition, you can also ask a trademark agency for help, which is generally free.