Suppose we fire two entangled particles in a tour round-flight around the galaxy and measure their spins using two Stern-Gerlach devices after returning back to the earth. Will the correlation between their spin measurement still obey quantum correlation? According to General Relativity, parallel displacement of the spin vectors should bring the two vectors into different states with some displacement. But QM prediction does not consider such effect as long as the state of one particle is only revealed when it is measured. So will parallel displacement issue account here to change the state of particles in a way that may not follow what QM predicts?