Mr Xishun, 56, towers above everyone at an astonishing 7.9ft, 19-year-old Mr Pingping is a mere 2.4ft high.
Mr Xishun was confirmed as the tallest person by the Guinness Book of Records last year.
Mr Pingping was born nearby in Wulanchabu city, Inner Mongolia. His father claims he was only the size of an adult's palm at birth.
He is now seeking to be registered as the world's shortest man by the Guinness Book of Recrods. He could be in for a disappointment though. While Mr Pingping is 73cms tall, the current holder of the title Lin Yih-Chih was measured as 67.5cm