You won't be able to come back to the Jade Chamber when you finish the story because it will explode.

Can you go back to the Jade Chamber?

Return Of The Jade Chamber is one of the worlds quests in Liyue. You can unlock "Return Of The Jade Chamber?" after completing Ganyu Story Quest and Fishing For Jade World Quest. And find a quest giver at Liyue Harbor.

How do I trigger return of the Jade Chamber?

In order to unlock the Return of the Jade Chamber world quest at the aforementioned location in Genshin Impact, you must first complete Ganyu's story and Fishing for Jade. Provided you've completed the Fishing mission, all you need to do is speak to Kun again in Liyue's Harbor.