Persistent humid climate favored the Qin and Western Han Dynasties in China around 2,200 y ago - Chun Qin; Bao Yang; Achim Bräuning; Fredrik Charpentier Ljungqvist; Timothy J. Osborn; Vladimir Shishov; Minhui He; Shuyuan Kang; Lea Schneider; Jan Esper; Ulf Büntgen; Jussi Grießinger; et al. (Proceedings of the National Academy of Sciences, 2025)