The Chinese-sensitive political hashtags are somewhat straightforward (they are topics that one would expect the state to be sensitive to), but there should sti

The Chinese-sensitive political hashtags are somewhat straightforward (they are topics that one would expect the state to be sensitive to), but there should still be a systematic procedure for choosing them to avoid biased sampling and post-hoc comparisons. The problem is more apparent with the controls: where do they come from? How were they chosen? Without this information there is no way to determine whether the categories are truly representative and whether the sensitive topics are really unique.