Search for Baryon/Lepton number violation processes at BESIII

The observed matter-antimatter asymmetry in the universe is a serious challenge to our understanding of nature. Baryon/lepton number violation (BNV/LNV) decays have been searched for in many experiments to understand this large-scale observed fact. We present the recent results from the BESIII experiment, including a search for BNV through $\mathrm{\Lambda }-\bar{\mathrm{\Lambda }}$ oscillation in the decays $J\mathrm{/}\psi \to p{K}^{-}\bar{\mathrm{\Lambda }}$ and $J\mathrm{/}\psi \to \mathrm{\Lambda }\bar{\mathrm{\Lambda }}$. We also present searches for LNV in $D_s^{+}\to h^{+}{h}^0{e}^{+}{e}^{-}$ and $\omega \mathrm{/}\phi \to {\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ decays, alongside probes into processes violating both baryon and lepton numbers simultaneously, such as ${\mathrm{\Xi }}^0\to K^{+}{e}^{-}\mathrm{/}{K}^{-}{e}^{+}$.