Entanglement Entropy of Mixed State in Thermal CFT${}_2$

Using the subtraction approach, we give the bipartite mixed state entanglement entropy in thermal ${\text{CFT}}_2$. With these entanglement entropies, we examine in detail the holographic duals of different entangling configurations unambiguously. In the thermofield double state, we show a horizon-crossing feature in two-sided entanglement configuration.