Likely this. Although, all the Chinese immigrants I knew who took new names chose awesome names like Ivan or Keefer. I actually knew two people called Jackie Chan. I asked one of them why he picked that name and he was like duh, it's because Jackie Chan is awesome and white people love him. He was totally right. Every time he introduced himself to people, they'd relish in saying ayyy like THE Jackie Chan, and then they'd do some karate gestures. People instantly liked and remembered him.