Sichuan Cuisine: Beijing has many famous restaurants to choose from when it comes to Sichuan cuisine. Some popular restaurants include "Sichuan Club" and "Spicy Temptation", which serve authentic Sichuan dishes including boiled fish, spicy chicken, mapo tofu and more. If you like Szechuan hot pot, you can also choose to go to "Pot Helmet" or "Hai Di Lao".
Cantonese Cuisine: Cantonese cuisine is also one of Beijing's specialties. Among the many Cantonese restaurants, Hong Kong Tea House and Foie Gras and Shark's Fin Seafood Restaurant are two of the most popular ones. They offer authentic Cantonese cuisine, including barbecue, dim sum, old-flame soup, and more. If you're looking for a Cantonese morning tea, head to Jing Cheng Yi Pin.
Local cuisine: In addition to Sichuan and Cantonese cuisine, there are many local restaurants in Beijing. One of the most famous is "Fengzeyuan Restaurant", a long-established Lu cuisine restaurant that serves authentic Jiaodong-style dishes, such as stir-fried cashews and roasted sea cucumbers with scallions. The Peking Duck is also a Beijing specialty, so try it at Quanjude or Duck King.
Other cuisines: In addition to the above mentioned cuisines, there are many other local cuisines to choose from in Beijing. For example, "Xinjiang Restaurant" offers authentic Xinjiang cuisine, "Liuzhou Snail Restaurant" offers authentic Guangxi cuisine, "Hunan Restaurant" offers authentic Hunan cuisine, and so on.
All in all, there are many restaurants in Beijing for you to choose from, and if you want to taste authentic local dishes, you can choose different restaurants according to your own taste. However, since different people have different requirements on the taste, texture and quality of service of the dishes, it is recommended that you check out the reviews, prices and other information about the restaurant in order to make a better choice.