One is the protection of people, and the other is the protection of things. Personal guarantee means that a third party other than the debtor takes credit as a guarantee and promises to realize the debt. The guarantee of things means that the debtor or the third party takes specific property rights as the guarantee to fulfill the debt;

The second is general guarantee and special guarantee. General guarantee means that the debtor guarantees the performance of the contract with his own property. Special guarantee means that the debtor guarantees with special things;

The third is legal guarantee and agreed guarantee. Legal guarantee refers to the guarantee directly stipulated by law. Agreed guarantee refers to the guarantee that is not stipulated by law and agreed by the parties;

Fourth, this guarantee and counter guarantee.