倪匡
Veteran Chinese novelist and screenwriter Ni Kuang was commissioned to create a script based loosely on Cheng Chi-Yong, a prominent Chinese figure in Thai society in the early 20th century. Ni Kuang changed the name of the character to Cheng Chao-an, after Chao'an county in eastern China, the home of Cheng Chi-Yong's ancestors. He also developed the idea of Cheng being sent by his mother to live and work with fellow Chinese migrants in Thailand, after his father had been killed in a fight. She gave her son a jade necklace symbolising peace, protection and good fortune, as a reminder to avoid trouble.