Someone posted about this a month or two back, if you search dim sum in the subreddit it should come up. The long and the short of it is there’s really none in Worcester, but if you’re generally looking for a more authentic Chinese experience rather than the typical american takeout style, I’ve heard good things about the Szechuan food at Red Pepper. Chuan Shabu also has some decent hot pot. But if you want dim sum, you’ll just have to drive or take the train in to the city - I highly recommend taking the train in and just listening to music or bringing a book to read or friend to chat with on the ride in. Once you’re there Chinatown is a short walk from south station.