  We present a way for the entanglement distillation of genuine mixed state.
Different from the conventional mixed state in entanglement purification
protocol, each components of the mixed state in our protocol is a
less-entangled state, while it is always a maximally entangled state. With the
help of the weak cross-Kerr nonlinearity, this entanglement distillation
protocol does not require the sophisticated single-photon detectors. Moreover,
the distilled high quality entangled state can be retained to perform the
further distillation. These properties make it more convenient in practical
applications.
