Patch 1

[tughv]

增加全连接的文档

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
13 out of 14 committers have signed the CLA.

:white_check_mark: lvjian0706
:white_check_mark: chajchaj
:white_check_mark: tngt
:white_check_mark: youngzhou1999
:white_check_mark: an1018
:white_check_mark: ZhangHandi
:white_check_mark: w5688414
:white_check_mark: Twelveeee
:white_check_mark: buriedms
:white_check_mark: XYZ-916
:white_check_mark: buaali
:white_check_mark: tughv
:white_check_mark: Niki173
:x: milen

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