The　human　settlement　system　is　central　to　land　use,　infrastructure　development,　and　environmental　impacts.　Although　central　place　theory　(CPT)　was　proposed　about　90　years　ago　and　has　been　extensively　examined　by　many　researchers,　to　what　extent　CPT　can　explain　the　current　rural　settlement　system　in　the　changing　age　of　informatization　and　geospatial　reconstruction　remains　to　be　explored.　This　paper　aims　to　contribute　fresh　evidence　for　settlement　systems　and　examine　the　applicability　of　CPT＇s　quantitative　laws　by　using　the　trajectory　data　of　2.0362　billion　trips　from　37.53　million　mobile　phone　users　in　China＇s　Jing-Jin-Ji　region　(218,000　km2　area).　We　found　that　the　settlement　system＇s　distribution　patterns　and　service　range　conformed　with　the　hierarchical　law　in　CPT.　However,　the　former　was　closer　to　the　administrative　principle　(K　=　7)　in　Christaller＇s　theory,　while　the　latter　was　nearer　to　the　marketing　principle　(K　=　3).　The　basic　service　range　of　all　levels　of　settlements　for　rural　residents　was　approximately　3　km,　which　was　reflected　by　the　rural　residents＇　3　km　travel　volume　peak　point.　When　exceeding　this　distance,　the　relationship　between　travel　volume　and　distance　distribution　changed　from　linear　increase　to　power-law　attenuation.　The　traditional　three　principles　of　CPT　influenced　the　settlements’　service　range　and　K　value.　Nevertheless,　the　specific　roles　of　the　influencing　factors　varied　in　space.　The　findings　of　this　paper　would　enhance　our　knowledge　of　CPT　and　settlement　systems　in　the　context　of　a　fast　growing　and　rapidly　urbanizing　society.　©　2023