Spatial distribution, proper motion distribution, magnitude-parallax diagram, and radial velocity distribution of NGC 752 member stars identified in Li et al. (2023) and a BSS reported by Daniel et al. (1994). Panels a–c: gray dots represent the cluster members of NGC 752 with P_m ≥ 0.9; for comparison, the star categorized as a BSS of NGC 752 by Daniel et al. (1994) is symbolized by a blue pentagram, labeled BS_D94. Panel d: black dots represent member stars meeting the criteria of the golden sample described in Sect. 2.1; the RV and corresponding error is from Gaia DR3; the green dashed line presents the mean RV value of the golden sample. The BSS reported by Li et al. (2023) is marked as a red triangle labeled BS_Li23 in all panels.