Suzhou has many well-known dim sum restaurants, here are some places to try:

1. Yihongyuan Laoshe Teahouse: Located near the Humble Administrator's Garden, it serves authentic Soviet-style dim sum such as Yangxian Tofu Flower, Tuanyuan Yuan, and Squirrel Gui Fish.

2. Chen McArthur: Located on Guanqian Street, it's a long-established Soviet-style dim sum restaurant and we recommend trying their Auntie Jiao's Stinky Tofu and Boiled Eel.

3. Peripheral Hill: Located on Pingjiang Road, it is famous for its pickles, pot helmets, Qianlong fish maw, and other Soviet-style snacks.

4. Yang Fu Ji: Located at Pingjiang intersection, it serves Soviet-style dim sum and snacks such as wu di cake, snail noodles, and glutinous rice crisps.

5. Guan Guan Xi Guan: Located at Guan Qian Street, it serves traditional Suzhou dim sum such as the famous white rabbit and salted duck eggs.

The above are just some of the recommendations, you can also visit local traditional food markets, night markets or ask local residents for more suggestions.