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Based on the second Gaia data release (Gaia DR2) and spectroscopy from theLarge Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data, weidentified 20,089 halo stars kinematically and chemically. The halo streams inthe solar neighborhood could be detected in the space of energy and angularmomentum. We reshuffle the velocities of these stars to determine thesignificance of substructure. Finally, we identify 4 statistically significantsubstructures that are labeled GL-1 through 4. Among these substructures, GL-1is previously known stream ("N2" stream) and the rest 3 substructures are new.These substructures may be the debris of dwarf galaxies accretion event, theirdynamical and chemical information can help to understand the history of theMilky Way.

The substructures in the local stellar halo from Gaia and LAMOST