If a trademark contains letters at the time of registration and is registered on the trademark registration certificate, then the trademark has letters. When using a trademark, you need to use it in combination with the figures and letters on the trademark registration certificate, otherwise the intellectual property rights of the trademark holder may be infringed.

If there are no letters in the graphic of the trademark, but the trademark holder uses the trademark in combination with the letters, then the use of the trademark may also infringe the intellectual property rights of the trademark holder. Therefore, when using trademarks, we must respect the intellectual property rights of trademark holders and follow relevant laws and regulations.