The reason why Chinese Pidgin English developed in the Southern part of China was because two groups with no common language needed to communicate.
When the English reached Southern China, they could not speak to the Chinese in English and neither could the Chinese.
They still needed to communicate somehow though so Chinese Pidgin English was born which combined aspects of the Chinese language to English.
Find out more on Chinese relations with the English at https://brainly.com/question/12299720.