The article contains to the history of the study of medieval sites in the middle current of the Shu River and the results of archaeological research carried out in 2018-2019 on the tortkull (the rectangular or square site) of Zhazyk (X-XI centuries). A brief review of the collected from surface materials on the tortkul, that have sizes: 75×75 m, that was identified and surveyed in 2018 by the Shu archaeological group (head: E.Akymbek) of the A. Kh. Margulan Institute of Archaeology. Data about gates identified during excavations in the center of the southern wall of the tortkul in 2019 are also reported. The width of the gate opening 4.8 m, thickness of walls on different sides is: 4.8 and 5.3 m. The results of the test pit (dimensions: 1×1 m) in the north-west corner of the site are also described. Based on results of semi-quantitative spectral analysis carried out on slag of iron and iron tip chemical composition and content of minerals are obtained based on results of semi-quantitative X-ray phase analysis of ceramic fragments.