Zhaozhou Li (李昭洲) is an associate professor at the School of Astronomy and Space Science, Nanjing University. He received his PhD from the Shanghai Astronomical Observatory in 2017, and was a postdoc at Shanghai Jiao Tong University (2018–21) and the Hebrew University of Jerusalem (2021–25), where he held a Marie Skłodowska-Curie Fellowship (2023–25). He works on galaxy formation and dynamics, with a focus on early galaxies, dark matter haloes, and the Local Group.JWST keeps finding galaxies that are too bright, too early. In galaxies today, feedback from massive stars keeps star formation inefficient. But in the dense, metal-poor gas of the first massive galaxies at z~10, clouds may form stars faster than supernovae can go off, producing "feedback-free" starbursts in thousands of compact star clusters. I will explain how this simple idea works, how its predictions hold up against JWST data, and what simulations tell us. I will then follow these galaxies past their peak: the clusters may help build surprisingly massive black holes, and star formation may shut down early, leaving behind the massive quiescent galaxies that JWST finds in abundance at z ~ 5.