I actually grew up in that region, but had never been to any of these renowned tourism spots.  In the summer of 2023, I brought my family back, and picked Zhouzhuang (one of the four towns in this site) to visit. 

Zhouzhuang is a little town in the prefecture of Suzhou, who also houses the WH site of Classical Gardens of Suzhou, which we also visited.  My parents drove us to Zhouzhuang and spent a good half-day.  The town is a network of rivers and canals with numerous traditional residential buildings that are at least 200 years old.  In fact a lot of people are still living in those buildings, but some chose to rent them out to shops and restaurants and live in the modern parts of the town.

The town is not huge.  I suggest walking the streets first to feel its ambience, tour one of the nobility residences, then eat at one of the snack shops, and buy some local crafts, before taking a boat ride to experience the serenity of the town.  Some of those restaurants and craft shops are a bit touristy, but others are authentically interesting.  My daughter bought a landscape wall art piece entirely made of reed leaves by a local artist.  My mom got a beautifully decorated vessel flute.  We also ate some traditional snacks that I hadn't eaten for a decade. 

The boat ride was absolutely adorable.  The canals are clean, and buildings well-maintained.  Besides many tourists, we did see local residents just doing their daily business.

Many of the Chinese tourists were dressed up in traditional costumes and having photos taken there, which might be something worth doing.  There were many costume rental shops there.  One could also purchase some traditional dresses in nearby Suzhou and add the less dramatic, more functional ones to their wardrobe.  My daughter had a shopping spree and really loved those dresses. 

We had our lunch at one of the restaurants right outside the site.  There were many of them, and some of them also provide lodging.  They are mostly run, I believe, by the locals so price and quality are reasonable.  

I speak Chinese so we didn't check if there are tour materials in English.  Honestly though, the histories of the place could be found on Wikipedia in great detail.  And the shops and restaurants should be quite easy to navigate.  Transportation-wise, one could consider taking a taxi from Suzhou or even Shanghai.

I am an armature photographer and took a lot of photos during this trip.  If anyone is interested, please visit my Flickr album.  Each photo should have captions about its location.