Detailed description of the nine main components of the duct filter section. 

Thank you for using this site (“we”, “us” or “our”). We respect your rights and interests in personal information, comply with the principles of legality, legitimacy, necessity and integrity, and protect your information security. This policy describes how we process your personal information.

1. Collection of information
Information you provide voluntarily, such as name, mobile number, email address, etc., is completed during registration. Information such as device model, browser type, access logs, IP address, etc. is automatically collected to optimize service and security.

2. Use of information
provide, maintain and optimize website services;
account verification, security protection and fraud prevention;
Send necessary information such as service notifications and policy updates;
Comply with laws, regulations and applicable regulatory requirements.

3. Protection and exchange of information
We use security measures such as encryption and access controls to protect your information and only store it for the minimum period necessary to complete the task.
Do not sell or rent personal information to third parties without your consent; Share only if:
Get your explicit permission;
third parties entrusted to provide services (subject to confidentiality obligations);
Respond to legal requests or protect legitimate interests.

4. Your rights
You have the right to access, correct and supplement your personal information, and you can also apply to cancel your account (after cancellation, the information will be deleted or anonymized according to the rules). To exercise your rights, you may contact us using the contact details provided below.

5. Policy Updates
Any changes to this policy will be notified by posting on the site. Your continued use of the services means your acceptance of the amended rules.