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* [Doc] Add 1st CN in chapter 6

* [Doc] Add 1st CN in chapter 6

* [Doc] Add 1st CN in chapter 6.1

* [Doc] Add 1st CN in chapter 6.1

* [Doc] Add 1st CN in chapter 6.2

* [Doc] Add CN in chapter 6.2

* [Doc] Add CN in chapter 6.3

* [Doc] Fix a code bug in chapter 6.3

* [Doc] Add CN in chapter 6.4, 6.5, and 6.6.

* [Doc] Add CN in chapter 6.4, 6.5, and 6.6，then remove EN parts.

* [Doc] revised 6.4, 6.5, and 6.6.

* [Doc] 2nd round of copyediting.

* Delete syn1.bin

Remove this unrelated file to this branch

* [Doc] Update guide_cn index.rst.

* [Doc] Update guide_cn index.rst.

* [Doc] Update guide_cn index.rst.

* [Doc] Update guide_cn index.rst.

* [Doc] Add chapter 7 in index page

* [Doc] edit chapter 6 in PR

* [Doc] edit chapter 6 in PR

* [Doc] Copyediting with Murphy and Minjie's comments.

* [Doc] Fix doc line in the previous chapters.
Co-authored-by: Jinjing Zhou <VoVAllen@users.noreply.github.com>
Co-authored-by: Mufei Li <mufeili1996@gmail.com>
Co-authored-by: Minjie Wang <wmjlyjemaine@gmail.com>