Can you open hec.su/dffr from mainland China?
No.
It's blocked — 100% of the last 1 conclusive tests failed in mainland China.
Access hec.su/dffr with GreatFireVPN →2016first tested
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Frequently asked questions
Is hec.su/dffr blocked in mainland China right now?
As of the last test on 2026-07-23, hec.su/dffr is 100% blocked in mainland China, based on GreatFire's live Great Firewall measurements.
Why is hec.su/dffr blocked in mainland China?
It's blocked — 100% of the last 1 conclusive tests failed in mainland China.
Since when has hec.su/dffr been blocked?
GreatFire has recorded interference with hec.su/dffr from mainland China since 2016-03-20.
How can I access hec.su/dffr from mainland China?
You need a circumvention tool such as a VPN. GreatFireVPN, built by GreatFire, is designed to bypass the Great Firewall and reach sites like hec.su/dffr.
http://hec.su/dffr · JSON