The Summer Palace must be fun, the Summer Palace is huge
I suggest you go to the Summer Palace, because there seems to be nothing to visit next to Shichahai.
The Summer Palace is bigger than Shichahai and has more attractions, so I think the Summer Palace is better than Shichahai.
Of course, choose the Royal Garden Summer Palace.
I went to both the Summer Palace and the beautiful lake.
Definitely go to the Summer Palace, the scenery is beautiful and fun

I went to the Summer Palace, and I felt that the ice rink was the only one that was interesting. There was really nothing interesting to see in other attractions, and many of the palaces inside required additional tickets to enter.
If you want to see the scenery, you must go to the Summer Palace. There is not much on the Shichahai side, but there are Nanluogu Lane and Yandai Xiejie commercial snack street near Shichahai.