1, if you are interested in this company, or want to understand the purpose and claims, you can answer the phone, or call back the number, or contact through the mailbox or website.
2. If you are not interested in this company, or feel that the call is a harassment or scam, you can refuse to answer the call, or hang up, or add the number to your blacklist or report it.
3, if you are not sure about this company or want to verify the authenticity and legitimacy, you can check the business information, credit information, risk information, etc. through platforms such as TIANYANCHA or AIJINCHA, or verify their qualifications and certificates through the relevant departments or organizations.