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Abstract The Mini-SiTian Array serves as a pathfinder for the SiTian project, which aims to survey the entire sky in gri bands every 30 minutes, reaching a limiting magnitude of 21. This special issue features 11 papers covering the design, operation, data reduction, and early scientific results from two years of Mini-SiTian observations. The insights gained from these pathfinder experiments represent a significant milestone toward the full realization of the SiTian project.
Huang et al. (Mon,) studied this question.