For my new site, what I'm doing is a full fallback - local, cdn font, served from my site, then regular font-family fallback.

Not sure if that works properly in China, if it just spins. It might never 'fail' and fall back. I'd need to test that.

Like so: src: local('Slabo 13px'), local('Slabo13px-Regular'), url(https://fonts.gstatic.com/s/slabo13px/v3/B9U01_cNwYDvIHK04hX...) format('woff2'), url(https://fonts.gstatic.com/s/slabo13px/v3/fScGOqovO8xyProgHUR...) format('woff2'), url("/fonts/Slabo13px-Regular.ttf"); }