Composite spectrum of the newly identified AGN at z ∼ 3. The spectrum is obtained by combining the continuum-subtracted (0.15″ × 0.15″) spectra of the newly discovered type 2 AGN COS1656-B, COS1638-B, GS551-B, GS10578-B, Eastfield, and Mr West, by employing a bootstrap method (Perna et al. 2017b); before the combine, all spectra were normalised to the Hβ peak. Red vertical lines identify the main optical lines, while blue lines mark the position of coronal lines (CLs). No CLs are detected in the composite spectrum, but the most prominent emission lines show blue wings likely associated with outflows.