This is the 2099th most frequent Russian word.
пекин
"Пекин" is "Beijing" (the capital of China) in English.
The word 'Пекин' is used as a proper noun representing the name of the city Beijing in Russia.
Я собираюсь посетить Пекин этим летом.
I plan to visit Beijing this summer.
'Пекин' is here employed as a subject noun, serving as the topic of the sentence.
Пекин - столица Китая и центр китайской культуры.
Beijing is the capital of China and the center of Chinese culture.
'Пекине' is used in the prepositional case ('о Пекине') to indicate discussing or referring to the city Beijing.