If it's that easy to do it accidentally, I rather suspect China's intelligence services have it already covered via compromised employees and hacked servers.
Not in that case, no. The document apparently was a post-mortem on a failed satellite launch, that said something of the sort, "the launch failed because the Chinese engineers haven't begun doing so-and-so with technology XYZ as we have." The fact that the launch had failed in the first place suggested that the Chinese did not yet appreciate the importance or realize the existence of technology XYZ yet.
