It was known in the recent past as Peking.
china
Peking
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The modern name of Peking, China is Beijing, China. It was formerly known as Peking due to the way the Chinese alphabet was being translated at the time.
WATER CUBE
The older name was Peking.
Peking duck
The actual spelling is "Peking Duck," because Beijing used to be known as Peking, and so the duck is a famous Beijing dish. It literally can now be translated as "Beijing Duck,"
I believe it's Peking, to the Chinese. Hope that helps!
Present day Beijing has had a number of names across the years e.g. Zhongdu , Dadu , Cambuluc ; see related link to this historic city .
The Chinese name for Beijing is Beijing. It means "North Capital." (Nanjing is the south capital.)
The "water cube' in Beijing Chinawater cube