Top: A researcher tags a Yangtze sturgeon at a facility in Yibin, Sichuan province, on Sunday. Above: Yangtze sturgeon juveniles are seen in the water in Jiang'an county, Yibin, on Tuesday. Scientists successfully conducted a trial to verify the function of a natural spawning ground for Yangtze sturgeon in a section of the Yangtze River. Observing natural spawning in undisturbed waters for the first time marks a significant step in rebuilding the wild population of this species, which was declared extinct in the wild in 2022.