[FEATURE] "Add space between English and Chinese" or "no space between English and Chinese" and keep one rule in one file

**Is your feature request related to a problem? Please describe.**
It is typographical stuff like space between two languages and between word and digit. Indeed the tutorials are excellent, but the space style does not follow a consistent writing style, like


**Describe the solution you'd like**
Either no space between English and Chinese and no space between word and digit, or one space between English and Chinese and one space between word and digit, in one tutorial docs. One file should has one style and keep it everywhere.