Privacy, in plain language.

Browsing the website

The public website can be read without an account. We use a first-party visitor cookie, lasting up to 90 days, to connect page visits, registration and customer catalog activity. We record page paths, times, referring site or page (without query strings), IP addresses and browser information. After successful registration or sign-in, the current visit history is linked to your account. Signing out starts a new visit chain. We do not use advertising cookies or third-party analytics scripts.

Use and retention of visit records

Visit records help us understand customer interests, respond to enquiries and protect accounts. Only authorised staff can view them; sales staff can access only records linked to their assigned customers. Logs are kept for 180 days by default, subject to the retention period configured by the site administrator. Passwords, verification codes and form contents are not included in visit logs. Clearing cookies or using another browser prevents us from joining anonymous visits; successful sign-in can link that browser’s current visit chain to your account. Contact info@durlevel.com with questions or deletion requests.

Preparing a project brief

The brief builder processes your entries in your browser. It does not submit them to a website database or save them in browser storage. Opening an email draft passes the brief to your chosen email application; copying it places the text on your clipboard when you choose that action. You decide whether to send it.

Email enquiries

Enquiries go to the company you select: sales@sxhillchem.com for Shanxi Hill, info@durlevel.com for Xi’an Super Supplement Factory, or candy@durlevel.com for Xi’an Durlevel New Materials Factory. The details you choose to provide can be used to respond to that enquiry and discuss your project. Please avoid including unnecessary sensitive information.

Customer registration and verification

Catalog requires an account. Public registration requires an email address verified by a one-time code and a contact mobile number. Mobile numbers are collected without SMS verification and are not proof of ownership. We store your account name, password hash, contact details, email verification time and any name or company you provide. The email delivery provider receives the address and message needed to deliver the code. Codes expire after 10 minutes and are stored only as keyed hashes; expired challenges are removed on subsequent code requests. Hashed rate-limit records expire within 24 hours. Registration contact details are used for account access and responding to enquiries, not automatic marketing subscription.

Account information and cookies

Sign-in and registration use essential security cookies. Customer account information is retained while the account is maintained. To request correction or deletion of your account information, contact info@durlevel.com. Staff may need to verify your identity before processing the request.

Questions about your enquiry

For questions about information sent by email, contact info@durlevel.com and identify the enquiry you are referring to.