Ping is a distinctly asian tale, which is one of it's strengths. The choice of words, architecture of word order, concepts of respect for elders, as well as the physical setting "on the yellow waters of the Yangtze River", and illustrations all contribute to give this story a distinctly asian feel. 
 The other strength is the positive moral, which is taking your punishment (a "spank" with a reed from the duck herder) in order to remain with the family, as opposed to setting out on your own. Themes of loyalty, structure/ routine/ responsibilities are also prevalent. 
 My son enjoys this book and has asked for it many times. We'll be adding it to our wish list.