On November 19, 2009, the latest research results on the Lorentz symmetry breaking were published in the Nature magazine as a "Letter" (the first volume 462, p. 331-334 ). Dr. Wu Xuefeng from Purple Mountain Observatory was involved in this research. as a visitor of Pennsylvania State University in the United States, On May 10, 2009, NASA's Fermi Gamma-ray Large Area Space Telescope detected a gamma-ray burst GRB 090510 as a transient object (duration of less than 2 seconds) of redshift 0.9. Using the arrival time lag (less than 0.86 seconds) of the bursts detected at 31 GeV photon energy relative to other low-energy gamma-photon, Fermi group derived that a larger energy for Lorentz symmetry breaking than Planck energy (1.22 X 10 ^ 19 GeV) is needed, thus excluded the possibility of a linear Lorentz symmetry breaking, which supports the hypothesis of Lorentz invariance in the Einstein's special theory of relativity.
　Only a few month after the launch of Fermi satellite, Dr. Wu Xuefeng and his collaborators got the new record of energy of quantum gravity using the long bursts observations of GRB 080916C (only one order of magnitude lower than the Planck energy).