Illustration of the target selection from VVV CL002. Panel a: field surrounding the cluster, panel b: proper motion diagram. Panel c: NIR colour–magnitude diagram. The field stars are plotted with the black points, while stars located inside the selection circles (orange) in panels a and b are indicated by green circles. Some of these stars in green were selected as spectroscopic targets based on panel c, and we observed the two red giants indicated by red diamonds.