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 the novel could be exempted from reading on Qidian Chinese Network. The readers could use the Qidian Reading App or Qidian Chinese Network's online reading service to read the entire novel. Qidian Chinese Network provided a reading environment without advertisements and pop-ups, providing readers with a good reading experience.