Walking on the road,
we will surely see some traces of littering by the people,
perhaps,
one day we can change,
and make the streets become completely new.

However,
Who is throwing garbage?
Who is picking up garbage?

Cleaning crews
are often considered to be cleaning machines by people.
People often litter in front of them,
but do not think about their feeling.

Next,

let us understand

the work content of cleaning crews together,

and learn their hard work together.