The study investigates the quenching mechanisms of massive quiescent galaxies at z ≈ 2, using data from the Blue Jay survey, a JWST Cycle 1 program. The authors fit spectral energy distribution (SED) models to the JWST/NIRSpec spectra of 14 massive quiescent galaxies (log(M/M⊙) > 10) to reconstruct their star formation histories (SFHs). They classify these galaxies into three groups based on their SFHs: (1) old galaxies quenched early, (2) galaxies recently quenched after a steady or bursty formation history, and (3) galaxies recently quenched after a major starburst. Most recently quenched galaxies show neutral gas outflows, indicating AGN-driven multiphase gas outflows as the primary quenching mechanism. The study also predicts the number density of massive quiescent galaxies at z ≈ 4–6 and discusses the descendants of early massive quiescent galaxies. The findings suggest that rapid quenching is prevalent at z ≈ 2, with approximately 60% of the quiescent galaxies being rapidly quenched, and only 30% being rapidly quenched after major starbursts (PSBs). The results provide insights into the quenching mechanisms and the evolution of massive galaxies in the early Universe.The study investigates the quenching mechanisms of massive quiescent galaxies at z ≈ 2, using data from the Blue Jay survey, a JWST Cycle 1 program. The authors fit spectral energy distribution (SED) models to the JWST/NIRSpec spectra of 14 massive quiescent galaxies (log(M/M⊙) > 10) to reconstruct their star formation histories (SFHs). They classify these galaxies into three groups based on their SFHs: (1) old galaxies quenched early, (2) galaxies recently quenched after a steady or bursty formation history, and (3) galaxies recently quenched after a major starburst. Most recently quenched galaxies show neutral gas outflows, indicating AGN-driven multiphase gas outflows as the primary quenching mechanism. The study also predicts the number density of massive quiescent galaxies at z ≈ 4–6 and discusses the descendants of early massive quiescent galaxies. The findings suggest that rapid quenching is prevalent at z ≈ 2, with approximately 60% of the quiescent galaxies being rapidly quenched, and only 30% being rapidly quenched after major starbursts (PSBs). The results provide insights into the quenching mechanisms and the evolution of massive galaxies in the early Universe.