Website Proofreading and Fixing (Chinese Simplified)

I am using the Autotranslation service for my project. It converts my site to Chinese Simplified. I am looking for a Chinese translator who can do proofreading and fix the problem where found. My site might have more than 40,000 words. Look forward to your reply.

Please share what will be the cost per word for proofreading and fixing if required.