Season 4 of Haikyuu begins approximately at chapter 290. But keep in mind that there might be some variations depending on different translations or editions.
The ending of season 4 of Haikyuu in the manga is at a point where a major plot development occurs. It's a bit complex to pinpoint exactly, but it's related to a key match or event in the story.
It ends at a specific chapter that focuses on a crucial match and character development. But I can't recall the exact chapter number off the top of my head.
The start of Haikyuu Season 4 in the manga is approximately at chapter 290. This might not be exact as sometimes there are differences in how the content is presented and divided between the two mediums.
The second season of " Celebrating Years " was officially launched on October 19th. At the launch ceremony, the leading actors Zhang Ruoyun, Guo Qilin, Song Yi, Tian Yu, and the screenwriter Wang Juan attended the event. Filming for the second season would begin next year. Although the exact cast had not been announced, it was certain that Zhang Ruoyun would continue to play the role of Fan Xian. The audience could look forward to the second season to continue the characters and actors from the first season. They hoped that they could once again perform brilliantly and be loved by the audience.