However, the Palace of Winter was only able to shrink due to its key having fallen into Song Shuhang's hands, and because of the relationship between Ye Si and Jade Lake Empress Cheng Lin. With the key, one could control the Palace of Winter to make it shrink, and then bring it into their Inner World.
Yet, the Palace of Summer did not have a similar function. The Palace of Summer only had a single stone tablet and a public square. All the structures on it were added by the scholarly faction. Therefore, shrinking the 'Palace of Summer' was impossible. The only way would be to directly bring it into his Inner World...
Wait! Perhaps it was really possible to directly bring it into his Inner World?
However, there was no need to rush this matter. After True Monarch Eternal Fire had transferred the control of the 'Palace of Summer' and the other fragments of the Heavenly City to Shuhang, he'd find an opportunity to test it out.
