Radio-loudness (R) comparison between DES0141−54 (red point) and high-z RL AGN sample from literature (blue triangles). DES0141−54 has the highest R at z ≥ 5. It is higher than those of the three most distant blazars already discovered (J0906+6930, J1648+4603, and J1026+2542). The objects circled in yellow are all the confirmed blazars found in the literature. We point out that these are only the blazars to have been validated in the literature.