There are many specialties that locals think are delicious but foreigners don't like. Some examples include:

Stinky tofu: This is a kind of stinky tofu, which may be difficult for foreigners who are not used to this taste.

Cordyceps sinensis: This is a kind of Cordyceps sinensis, which is usually dry. Foreigners may not be used to its special taste and texture.

Wild animals: In some parts of China, deer meat, bear meat, raccoon meat and other wild animals are common foods, but they may not be very delicious for foreigners.

Snakeskin: This is a very popular food in China, and foreigners may not accept it.

These are just some examples. Taste and preference are personal, and different people may have different reactions.