We haven't tested developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/webfont-optimization?hl=zh-cn in the last 90 days. As of the last test on 2026-04-27 (3 mo ago), it was blocked in mainland China. Use the Test now button on this page for a fresh measurement.

As of the last test on 2026-04-27 — 3 mo ago — it was blocked in mainland China. We haven't tested it since, so this may have changed.

GreatFire has recorded interference with developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/webfont-optimization?hl=zh-cn from mainland China since 2018-02-15.

You need a circumvention tool such as a VPN. GreatFireVPN, built by GreatFire, is designed to bypass the Great Firewall and reach sites like developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/webfont-optimization?hl=zh-cn.