Recent years have witnessed remarkable progress in nickelate superconductivity, with global teams identifying multiple nickelate superconductors under both ambient and high pressures. U.S. and Chinese research teams independently discovered ambient-pressure superconductivity in Ruddlesden-Popper bilayer nickelate thin films through distinct technical pathways, establishing a novel platform for probing high-temperature superconducting mechanisms. The Chinese team synthesized pure-phase bilayer nickelate films with atomically smooth surfaces using their proprietary Gigantic-Oxidative Atomic-Layer-by-Layer Epitaxy (GOALL-Epitaxy) technique. Enabled by in situ strong oxidation processing, surface sensitive measurements, such as ARPES, can be conducted with these atomically flat films, revealing the electronic structures of the superconducting phase, and promising further in-depth experimental research on superconducting mechanisms. Through synergistic efforts in lattice engineering, rare-earth/alkaline-earth element substitution, and interface strain engineering, this system holds potential for achieving higher superconducting transition temperatures.