Illegal. If shareholders process products privately and steal company names or trademarks from products, this behavior usually violates the provisions of the Trademark Law, the Anti-Unfair Competition Law and other relevant national laws and regulations and is not allowed. The Trademark Law of the State clearly stipulates that unauthorized use of a trademark that is the same as or similar to its registered trademark without the permission of the trademark registrant is regarded as infringement of the trademark right, and it is easy for the public to confuse the source of the goods when it is used on the same or similar goods.