Privacy notice
This page explains how the SMM team handles your visit data. We collect only what we need to understand how the conference companion site is being used, and we never sell, share, or send your data to third-party services.
Opt out of all visit logging
When enabled, your browser will not be counted in any aggregate visit metrics and no analytics cookies will be stored on this device.
Who is responsible
Controller: Shanghai Metals Market (Shanghai SMM Information & Technology Co., Ltd.). Contact: vincentliao@smm.cn.
What we collect
Page URLs, language, referrer, viewport size bucket, device class (mobile / tablet / desktop), timezone, UTM parameters, and short-lived event signals (CTA clicks, scroll milestones, dwell time). Your IP address is truncated (to /24 for IPv4 or /48 for IPv6) and one-way hashed before storage — the original IP is never written to disk. We do not collect your name, email, phone, or company unless you fill out the contact form, which is processed separately and is not part of this analytics dataset.
Cookies
Up to two first-party cookies may be set: anon_id (30 days, repeat-visitor counting) and icm_sess (browser session, request stitching). Visitors from the EU, EEA, and UK are placed in cookieless mode by default — neither cookie is set unless you switch language explicitly. No third-party cookies are used.
How long we keep it
Event-level rows are purged after 90 days. Pageview rows after 180 days. Session metadata after 365 days. Daily aggregate counts are retained without an end date.
Cross-border transfer
Data is stored on a server hosted by SMM for global delivery and may be accessed by SMM staff in mainland China. By using the site you acknowledge this transfer under PIPL article 39.
Your rights
You may opt out at any time using the toggle above. You can also request access to or deletion of any data we hold about your visit by writing to vincentliao@smm.cn.
Browser signals we honor
We respect the Sec-GPC (Global Privacy Control) header, the legacy DNT header, and a user-set opt_out=1 cookie. Any of these suppresses ingest for the request.
Changes
We may update this notice as the site evolves. The current version is the one displayed here.