LAMOST MRS photospheric-subtracted spectra of LO Tau in the spectral region containing the Hα and He I λ6678 Å line. The spectra have been sorted in time order from top to bottom (except for the uppermost one) and have been vertically shifted for clarity. The modified Julian day (MJD) is written next to the spectrum. The uppermost spectrum plotted with a red line displays a very strong and broad Hα profile as well as the He I line in emission, which is indicative of a flare event.