Website url of different default language

Hi,

I'm using Content translation in drupal 7. I had enabled Chinese Simplified other than the default language, English.

When I'm using Chinese Simplified as my site's default language, the default url appears to be xxx.com/zh-hans

Even if I enterd the url as xxx.com, it links to xxx.com/zh-hans

But if I set English as the default language, it won't link to xxx.com/en but maintains at xxx.com

Is there any way that I can set Chinese Simplified as deault language, while the default url will not link to xxx.com/zh-hans?

(I prefer xxx.com displays chinese content, while xxx.com/en displays english translated content.)

Thank you in advance.