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Due to the large splitting in the excited hyperfine transitions of cesium $D_2$ line, it is relatively simple to implement the RGMC with suitable frequency control on the trapping and repumping lasers of the magneto-optical trap (MOT). We have achieved an atom temperature of 1.7$\\pm$0.2 $\\mu$K after the RGMC with $3.2\\times 10^8$ atoms. The phase space density is $1.43\\times 10^{-4}$. 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