Same as Fig. 12 for the carbon stars in the LAMOST sample by Ji et al. (2016). Grey circles show CH-type stars, brown circles show R-hot stars, blue circles show normal N-type stars, open blue circles show possible N-type stars, and open orange circles show carbon stars of unknown type. For completeness, we show (cyan circles) the carbon stars in Chen & Yang (2012) with (J − K_s) > 2.5 mag. The inset shows a zoom of a small area in the location of the R-hot and CH-type stars (see text).