A family of Microsoft word processing software products for creating web, email, and print documents.
1
If the text of your documents appear in Chinese, that usually indicates the file association on the Word documents is broken and the Word files are opening in another app like Notepad.
Right click a Word Document and select 'Open With', then from the resulting list, select Word and ensure you tick the box to 'Always use this app to open .docx files' box to reset the file associations.
Does that file then open correctly in Word?
2
If that was not the problem, please provide a screenshot of one of the word files open showing the Chinese text.