There is no causal link between the two suggested in any reputable sources. Every RS on this issue has simply said that the relationship exists, none of them provide any substantial reason for anyone to believe that He Zuoxiu wrote his critical piece because of Luo Gan, nor does it suggest anywhere in reliable sources that the two ever 'collaborated'. He is a scientist who has railed against, among other things, traditional Chinese medicine, supernaturalism, and all sorts of Qigong. Luo Gan works for state security, not the propaganda department, nor did he have any role, it seems before 6-10. Some sources contain a few speculative lines or two about this issue (such as Schechter), but no source can substantiate that this relationship had a causal effect on any events that took place. +