Complex sentence: The "shuanggui" system was established in 1994 by order of the CCDI; it was first officially mentioned in Article 28 of the Regulation on Dealing with Cases of Party Discipline Violations, which came into effect on 1 May 1994.
Split into simpler sentences: The "shuanggui" system was established in 1994 on the orders of the CCDI. Its first official mention was in Article 28 of "Regulation on Dealing with Cases of Party Discipline Violations", which came into effect on 1 May 1994.