Acquaintance - Met Jingxu, when neither of them were interested in love.
Knowing each other - Lai Shang Jingxu, when both of them recognized that "friendship is better than love".
Falling in love - falling in love with Jingxu, when both of them feel that the other can make do with each other.
Fall in love - fall in love with Jingxu, when both of them are used to the other being embedded in their lives.
Jingxu expressed serious protest to the above four sentences, and said: "I am one step ahead of you in all four processes, and you have the nerve to write it down for each other."
...........