It is not illegal to engrave someone else’s private seal on Taobao. It is illegal to engrave official seals privately. Private engraving of official seals refers to the act of individuals or other organizations privately engraving official seals of other companies. The official seal is the legal representative symbol of a unit, enterprise, undertaking, group, or school. Engraving units and individual employees who violate national management regulations will be subject to public security management penalties or be held criminally responsible in accordance with the law, depending on the nature of the problem and the severity of the circumstances.