Check cn (中文) locale and fix typos

Check locales by native and fix typos.

Project use [jekyll-multiple-languages-plugin](https://github.com/kurtsson/jekyll-multiple-languages-plugin). Each locale file are keeped in `_18n` folder.
For example `en` is located in `_18n/en.yml` file.

Project was translated by translation service not by human. So it can keep typos.

Need to check current issue language.

- Fork
- Create branch 170_cn_locale
- Commit and create PR

Start by reviewing the Chinese locale file under `_18n`, using `_18n/en.yml` as the example for the locale-file layout. Check the Chinese text for typos and commit the corrections on the `170_cn_locale` branch, then open a pull request with the locale reviewed and corrected.

Written by the indexing model from the issue text.