Outflows of DELS J0411–0907 and VDES J0020–3653. Left: ionised gas outflow mass rate as a function of AGN luminosity, for the two quasars at z ∼ 6.8 presented in this paper, and for various other AGN at lower redshift (0 < z < 3; from Fiore et al. 2017). The solid line is a linear fit (in logarithmic scales) of the latter data. The ionised outflows of the two quasars at z ∼ 7 follow the same relation as quasars at lower redshifts. Right: kinetic power (P_K) of the ionised outflows as a function of AGN luminosity (same symbols as in the left plot). The dashed lines show constant ratios of P_K and L_AGN as labelled. We note that the Fiore et al. (2017) galaxies have been shifted by log(5/2) for consistency with our density assumption of 500 cm⁻³, as they assume 200 cm⁻³.