1. Basic information of the complainant and the respondent, including the complainant's name, ID number, address, postal code, telephone number, etc. , as well as the name, address, postal code, contact person and telephone number of the respondent.
2. Time, place, process and negotiation with the operator.
3. Relevant evidence: The consumer shall provide evidence related to the complaint to prove that there is a causal relationship between the purchase, use of goods or acceptance of services and the damage, except as otherwise provided by laws and regulations.
4. Clear specific requirements.