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Mixed Spin P fields are introduced by Jun Li,Weiping Li,Chiu-Chu Melissa Liu and myself.The moduli of MSP fields relates GW invariants of a hypersurface with FJRW invariants of the corresponding singularity.When the hypersurface is quintic CY 3 fold,we have shown the relations effectively determine both GW and FJRW recursively,for all genus.I will brief the deduction,and then discuss some properties in the deduction which may fail when hypersurface is not CY.