Green Maker is a company that provides entrepreneurial services. They can send verification codes to users by SMS or other means to ensure the safety of users' identities and verify their operations. You received the verification code of Green Maker, probably because you registered or used related services on this platform. If you haven't done relevant operations or registered on the platform, it may be because someone mistakenly entered your mobile phone number, or your mobile phone number has been abused, so you need to contact Green Maker customer service or related platforms in time for verification.