Around April 10, we began hearing reports that Medium was blocked in China. The first evidence of a block involved WeChat. Over the following days, the various tools for testing site availability across China’s ISPs showed indications of blocking ranging from partial to full resolution failure for Medium’s web interface, both http and https. Currently, services like GreatFire.org show a more or less complete block of all posts on Medium.
We’ve heard several theories, and have a few of our own. But, we don’t know with any certainty the reason for the block. We haven’t spoken with Chinese authorities about it. If and when we have an update, we’ll let you know.