Els and I discussed this when I submitted the connection by email. From the diary it is obvious he does spend some time in the northwest section of the old walled city. Very much in the vacinity of the Garden of Cultivation, moreover he stayed not too far from the Lingering garden.
However, since he visited Suzhou in 1488, it is difficult to know to what extent any of these gardens existed. Furthermore, in the diary, nowhere does he specifically mention gardens. He details much of the atmosphere, people, trade, business, and some of the sights of the city. Nevertheless, his descriptions lack any real connection to the inscribed gardens.
I hesitated to include Suzhou in the connection, but as it was an important part of Choe Bu's journey, I thought I would include it see what Els and others thought.