I don’t have a source, but they do traffic analysis to detect VPNs based on usage, not just protocol. For example, ssh is not blocked. However, use ssh -D to p

I don’t have a source, but they do traffic analysis to detect VPNs based on usage, not just protocol. For example, ssh is not blocked. However, use ssh -D to proxy web traffic through your connection, and the whole connection will hang in short order.