事件伊斯兰教约8–10 世纪形成期Formation period c. 8th–10th c.
逊尼四大教法学派形成Formation of the Four Sunni Legal Schools
哈纳菲、马立克、沙斐仪、罕百里等学派在9–10 世纪前后制度化。H 轨：Melchert 研究；T 轨：教法多元一体叙事。Hanafi, Maliki, Shafi'i, Hanbali schools institutionalize c. 9th–10th c. H-track: Melchert; T-track: unity-in-plurality of fiqh narrative.