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The quasar spectra were obtained with {\\it Gemini} GNIRS that provide continuous wavelength coverage from $\\sim$0.9 to $\\sim$2.5 $\\mu$m. We detect 32 strong Mg II doublet absorbers with rest-frame equivalent width $W_r$ ($\\lambda2796$) $>1.0$ \\AA at $2.2 < z < 6.0$. Each Mg II absorber is confirmed by at least two associated Fe II absorption lines in the rest-frame wavelength range of $\\sim 1600-2600$ \\AA. 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