Hi, what are the best places to go from starting Saturday Morning until Sunday Night in Suzhou?

Oh, you can well arrange your two days. On the 1st, go to the Classic Gardens first, among which the Lingering Garden and Humble Administration Garden are the most famous. Then head for Guanqian Street to taste local snacks for a romantic experience. In the late after, take Tourist Bus Line 4, the last one leaving around 21:00, to Mudu Water Town. Stay there for overnight and spend a good time with your girl on the 2nd day.
Good trip!