Since the admin page is probably completely unreadable to you right now, I think the easiest is to run setup again and select the desired language on the bottom of the setup page.
It is not completly unreadable. But for me it is not normal that some words in Chinese. When I run setup i had chosen prpoper langugae. But still some words are in Chinese.
That could mean that somehow the install is set to http accept language which means it picks the language the browser tells. If you are not Chinese it would be weird if it was set to Chinese though. But maybe check that.
