1. Authenticity: Evidence should be objective, true and credible. The facts expressed or reflected in the evidence require consistency with what happens or exists in the real world.
2. Legitimacy: Obtaining evidence through legal means is in compliance with relevant laws and regulations. This means that the acquisition and use of evidence conforms to the relevant legal procedures and regulations applicable to the region and the country.
3. Coherence: Evidence should be relevant to the case, which can promote the correct judgment of the disputed issues in the case. Relevance requires that the evidence provided must be directly related to the disputed matter to a certain extent, and can provide helpful, clear or explanatory functions to the disputed matter.