An idiom representing happiness.

We became old friends as soon as we met. We hit it off like old friends when we first met. On the train, they had a good chat. Love each other.

A brief encounter [xi ā ng ji à n hen w m: n]

[Interpretation] I only hate to meet each other late. Described as an old friend, the spirit is very congenial.

[Source] "Historical Records Wei Wuqi An Hou Biography": "The two are important to each other; He swims like a father and son.