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.