Mirror symmetry due to time reverse symmetry, like proton decay into neutron takes same time 881(second)=(8.4087*10^-16)^2*(1.602*10^-19)/(137.036*0.938*10^9*10) with neutron decay into proton, which keep C symmetry of up, down quark, Keon decay time different plus CP broken symmetry make CPT symmetry, by SR symmetry E=t and string theory of strong force of asymptotic freedom Keon have different radius make scatting amplitude different broken mirror symmetry.