Number distribution of LOFAR-detected neighbors around HLIRGs within 100″ compared with that around random positions in Boötes and EN1 fields, respectively. The minimum 150 MHz flux densities are 0.15 and 0.07 mJy, respectively. We find a more significant difference (4.7σ in comparison with 1.9σ) between HLIRG neighbors and random neighbors in the EN1 field, which is the deepest LOFAR field.