Recent development on the Daya Bay reactor neutrino experiment*

The Daya Bay Reactor Neutrino Experiment has been very successful in unveiling the last unknown mixing angle using multiple detectors at various baselines with a designed 90{\%} C.L. sensitivity of Sin$^2$(2$\theta_{13}$) \textless~0.01. The experiment is now running in its full 8 antineutrino detectors configuration and effort is focused on finalizing the 6-detector rate and shape analysis. This talk will focus on an analysis to extract the antineutrino energy spectra of the four major reactor fissionable isotopes based on different reactor burn-up periods in the Daya Bay data set.