GBC is the abbreviation of a Chicago law firm in the United States. Its full name is Greer Burns & Crain Ltd. The law firm often helps brands fight various intellectual property lawsuits. Chinese sellers may receive emails from GBC when running AliExpress stores. If the content of the email shows that the store infringes, the store funds will be frozen.

To avoid infringement, it is recommended that you check the intellectual property status of the product before listing it to ensure that there is no infringement of the product.