At the intersection of Renmin Middle Road and Chunyuan First Street, on the north side of Chunyuan Park, there is a booth for freshly squeezed sugarcane juice. You can choose to squeeze bamboo cane on the spot.
This booth has been around for many years. I don't know if it still exists. If not, walk a few steps inside (east) and there is another gear on the left. As shown in the figure, under the arrow "west" is bamboo cane juice: