Of course it is illegal. Everyone has his own trademark. This is not allowed. Chapter 7 of the Trademark Law protects the exclusive right to register a trademark: Article 50 Intentionally provides warehousing, Transportation, mailing, concealment and other convenient conditions. Article 52: For infringement of the exclusive rights of registered trademarks, the amount of fine shall be less than three times of the illegal business revenue. If the illegal business turnover cannot be calculated, the fine amount shall be less than 100,000 yuan.