The Rationale Behind Our beloved CP's name - RuGu

As this couple is so wonderful, of course there must be a CP name for them.  Apparently, the confirmed moniker is RuGu according to the Chinese boards/communities.  @CloudA and @ajoke shared the rationale behind RuGu:

liu yuRU and GU jiusi.

一见茹顾 is the same pronunciation of 一见如故. Meaning :The first time they met, they were like old friends or they feel familiar with each other at first sight . Describing a destined love in this drama's context.  

https://mydramalist.com/72599-chang-feng-du#comment-13573767

@CloudA, update made as requested.