Perfect Simplified Chinese Proofreading

I have a set of teaching notes written in Simplified Chinese by an older-generation teacher. The content is solid, but the language shows the usual mix of dated wording, small grammar slips, and inconsistent punctuation I’d like to modernise... (Budget: $250 - $750 USD, Jobs: Copy Editing, Editing, English (US) Translator, Language Tutoring, Microsoft Word, Proofreading, Simplified Chinese Translator, Writing)