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以岩相及相序为基础，不同级别旋回层序及其有序叠加形式为研究核心，在进行１／５万区域地质调查的同时，对河北兴隆中、上元古界旋回层序特征进行了初步研究。将厚近万米、延续时间达１０亿年左右的地层，划分为４个一级超层序、１７个二级大层序、６２个三级层序。三级层序的划分和识别建立在米级旋回层序及其有序叠加形式的基础之上。旋回性沉积记录的研究，为中、上元古界“系”的划分和建立提供了基本资料，一级超层序与银河年旋回存在成因联系。
Based on lithofacies and facies sequence, the different levels of gyration sequences and their superimposed patterns are the core of the study. While carrying on the geological survey of 1/50000 in the area, the characteristics of the Mesozoic and Upper Proterozoic gyration sequences in Xinglong, Hebei A preliminary study. The strata that is nearly 10,000 meters thick and lasts for about 1 billion years are divided into 4 first-level super-sequences, 17 second-level sequences and 62 third-level sequences. The classification and identification of tertiary sequences are based on the order of the Mi-level cycles and their ordered superposition. The study of the cyclonic sedimentary records provided the basic data for the division and establishment of the “Proterozoic” system in the Mesoproterozoic and the Proterozoic. The first-level super-sequence was connected with the Galactic cycle.