1. Distribute the burden of proof according to the elements of rights protection: in all things that claim the existence of rights or legal relations, the parties need to bear the burden of proof for the elements that produce rights or legal relations. (The conclusion of the contract and the existence of tort legal relationship)
2. The fact that the right or legal relationship is blocked shall be borne by the other party who denies the existence of the right or legal relationship. (After the conclusion of the contract, one party claims to have been deceived, coerced or misunderstood, resulting in the invalidity of the contract)
3. Those who claim that the original right or legal relationship has been or should be changed or eliminated shall bear the burden of proof for the special elements of change or elimination. (Change the supplementary agreement to the contract, pay off debts, perform the contract and offset debts)
4. The party claiming that the power is restricted shall bear the burden of proof for the constitutive elements of the restricted right. The norm of the disappearance of limitation of action