∴ o is OE⊥BD, connecting PE,
∴∠PEO is the plane angle of dihedral angle P-BD-C,
∵ quadrilateral ABCD is a rectangle,
∴BC⊥CD,DA⊥AB,
∫ point a moves to point p,
∴PD⊥PB,
And the projection of point p on the plane BCD is on the CD,
∴ Make PO⊥CD after point P,
∴PO⊥ BCD,
∴BC⊥ PCD,
∴PD⊥ People's Bank,
∴PD⊥PC,
∴△CPD is Rt△,
AB = 6,BC=23,
∴PC=26,PO=22
In Rt△DPB, PD=23, PB=6, BD=43.
∴PE=3,
∴sin∠PEO=POPE= 13,
So the answer is: 13.