The discovery of high Tc superconductivity in cuprates attracts people to explore superconductivity in nickelates, whose crystal structures are similar to cuprates. Recently, Danfeng Li et al. at Stanford University published an article in Nature, reporting the observed superconductivity in hole-doped nickelates Nd0.8Sr0.2NiO2. Different from cuprates, the parent compound NdNiO2 does not preserve long range magnetic order, which was thought to be responsible for superconductivity in copper oxides. Besides, the ground state of NdNiO2 is metallic. The comment article In Nature noted that Li's work could become a game changer for our understanding of superconductivity in cuprates and cuprate-like systems, perhaps leading to new high-temperature superconductors.