Neutrino mass, shown by neutrino mixing and oscillation, is currently the only sign of new physics beyond the Standard Model (SM) of particle physics. In the completion of the three neutrino mixing angles, the Daya Bay Reactor Neutrino Experiment played a crucial and pioneering role in the measurement of the lastly known mixing angle θ13. Despite all the progresses in the last two decades in neutrino physics, we still only know the two mass-squared differences about neutrino mass, neither their absolute values nor the mass ordering. Due to the challenges in measuring the absolute masses, the neutrino mass ordering (NMO) is very likely to be the first experimental handle we could have on physics related to neutrino mass. With the success of the Daya Bay experiment and its contemporaries, it is now possible to resolve NMO using reactor neutrinos. Jiangmen Underground Neutrino Observatory (JUNO) was proposed to take the advantage of this principle to resolve NMO. In this talk, we will give a general review on neutrino physics, the discovery of neutrino oscillation and its recent experimental progresses, with the focus on Daya Bay and JUNO in China.
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