human rights - Conflicting directions

Why are three Tiananmen mothers being arrested only days before China wants to boost its human rights image by publishing a white paper on the issue?
The cynic in me first looked whether no high-level US visitor was due who could actually plead for the release of the three women, distracting his attention from other issues. But this time I could not find any visitor, but a connection with the White paper seems rather likely.
Policies in China are never going into one direction, and it looks like not everybody on the conservative side is happy with the current plans of the central government on human rights. They want to make a point, at least that is at this stage my analysis.