Filled red circles and filled black squares respectively represent literature CEMP-r/s and CEMP-s stars compiled by Goswami et al. (2021), and the blue star represents the programme star. Panel a: grid formed by the dotted red lines bound by 0.0 < [La/Eu] < 0.6 and 0.0 < [Ba/Eu] < 1.0 indicates the region defined for CEMP-r/s stars by Goswami et al. (2021). The grid formed by the black dashed lines bound by 0.5 < [La/Eu] < 0.7 represents the region where [Eu/Fe] > 1.0 classifies the stars as CEMP-r/s and [Eu/Fe] < 1.0 classifies the stars as CEMP-s. Panel b: red dashed line at [hs/ls] = 1.06 and the black dashed line at [hs/ls] = 0.65 represent the peaks of [hs/ls] for CEMP-r/s and CEMP-s, respectively, as shown by Goswami et al. (2021) in Fig. 13a.