Is it free to proofread the master by polymerization?

It is not free. According to the standards, the main proofreader checks and modifies the articles and papers written by users, and collects fees. It takes 15 yuan to find out all the typos and wrong punctuation marks in the document, and 20 yuan to replace the correct words and symbols in the article. Users need to pay for using this software. Aggregation Proofreading Master is a tool for checking and modifying articles, papers and other texts written by users.