Qing Chou and Lao Nian

I trouble myself
Now and again
Thinking about
The three stages
In the life of man
Qing Chou and Lao Nian

Wondering where
In their midst
I presently stand
Betwixt the there I go
And the here I am
Not entirely sure
I still know the difference
Between Qing Chou and Lao Nian