At Zhouzhuang’s northeast corner, two bridges meet over the crossing of Yinzi Bang and the north–south town river. One is Shide Bridge, a stone arch; beside it is Yong’an Bridge, a flat stone-beam bridge. Seen together, their openings make one round and one square shape, often compared to an old-fashioned key. Their fame rests on a precise piece of town engineering: each bridge answers a different channel and crossing, while together they mark a place where routes through the town converge.
The bridges are not a detached monument set in a scenic backdrop. Streets approach them, houses press close to the banks, and the water continues under and beyond them. The familiar view makes more sense when read as part of a network: At this crossing, the two waterways meet at right angles, and stone bridges let people cross without breaking the routes boats could use. A bridge here joined neighborhoods and markets as much as it framed a picture.

