The Guarantee Law of People's Republic of China (PRC) stipulates that "the guarantee of debt refers to the system specially stipulated by law that the debtor is guaranteed to perform the debt with the credit of a third party or with specific property, which is realized by the creditor". "Guarantee" refers to the guarantee method or legal system that a third party other than the debtor guarantees the debtor to perform the debt with its credit. In the private lending relationship, the person who personally proves and witnesses the occurrence of its creditor's rights and debts is the witness. Guarantor, guarantor and witness bear different legal responsibilities because of their different nature and relationship. Therefore, in the loan contract and non-governmental lending relationship, whether signing as a guarantor, guarantor or witness, you must indicate your identity or clearly agree before your name, otherwise you will bear unclear agreement or corresponding legal responsibilities.