Presented by Bo Li: Long-distance and low-dissipation spin transportation is an attractive subject in spintronics. In recent years, there have been great interests in the coherent spin transport via collective orders in magnetic systems. This phenomenon stems from the spontaneously breaking of U(1) symmetry and is termed as spin superfluidity. Unlike the ideal superfluidity, the spin superfluidity in a real system is impeded by weak U(1) symmetry breaking and low dissipations. Nevertheless, the spin superfluidity still possesses prominent advantages over conventional spin transport. The most remarkable feature is that the spin current in a spin superfluid shows an algebraic decay over the propagation length, in sharp contrast with the exponential decay in conventional diffusive transport. This presentation will introduce the basic concept of spin superfluidity in ferromagnetic and antiferromagnetic systems, and discuss the obstacles in its realization and possible resolutions. It will also discuss some interesting theoretical proposals and review recent progress in experiments. In the end, this presentation will be concluded by comments on open questions and research proposals for exploring spin superfluidity in other materials.