A velocity plot of a highly enriched C iv absorber at z = 2.030069 toward HE1122−1648. The zero velocity is centered at z = 2.030069. Although there is no obvious Lyα absorption seen at the zero velocity, both C iv and N v doublets are present to secure the existence of this absorber. Note that the y-axis range for each ion is different: from the normalised flux 0 to 1 for H i and from 0.5 to 1 for the rest of the ions.