"Amidst the cheers, he took off the second button of his military uniform and put it in her hand, and cheers rang out..."
This is a plot that Yan Yuan read a long time ago, from a story written by Youxiang, a poor writer from that century AD. People of that era were used to express love implicitly and restrainedly.
The second button on the military uniform is closest to the heart. It is the only button that has both a number and a name engraved on it.
He likes her, right? He finally responded to her, before running off to the battlefield again.
I like you, Fu Cheng likes Ming Huan.
Concept: time and love