Both the legal representative and the person authorized and sealed by company can represent the company. When the company is dealing with the special person, either the sign of legal representative or the seal of company can delegate the company. If the dealer is the shareholder of company, we must take the seal of company as the delegation of company but if the dealer is not the special person, we must both take the seal of company and signature of the legal representative. The seal of company is the special object of company, which is occupied by the legal representative, but the shareholders have the power to decide which person could occupy the seal of the company.