This is the 9345th most frequent Russian word.
тайбэй
"Taipei" - the capital city of Taiwan.
Here, 'тайбэй' is a proper noun used to name the capital city of Taiwan.
Тайбэй - столица Тайваня.
Taipei is the capital of Taiwan.
In this sentence, 'тайбэй' is used as the destination of a planned trip.
Мы хотим поехать в Тайбэй в следующем году.
We want to visit Taipei next year.
Here, 'тайбэя' (genitive case of 'тайбэй') is used to describe a characteristic associated with the city.