Much like many other towns and cities around the world today, Tokyo has an incredible number of Chinese restaurants. And just like many of these places overseas, the food served is more often than not less than authentic, being an interpretation molded to local tastes and influences. While often delicious in their own right, many Chinese offerings can be somewhat frustrating for those purists looking for proper regional fare hailing from the Middle Kingdom.
Fortunately, there are places like Manrikiya ("House of Knaves") in Azabu-juban that more than adequately address these needs, in this case with some fantastic Szechuan and Shaanxi cuisine. The house specialty is noodles, with standouts being the spicy dan dan noodles without broth (shirunashi tantanmen) and the thick Xian-style egg noodles with beef (gyuuniku futomen). There are of course standards such as dumplings and stir-fried dishes available as well, so you can delight your palate no matter what your appetite desires.