Rivers and lakes, not streams and seas, because streams cannot hold more, give people the feeling of gurgling water, crystal clear, and we can't bear to see the turbidity; the sea is so huge, violent and terrifying, we only have awe in our hearts, and feel intimidated.
Only rivers and lakes can truly express artistic conception. Rivers have the meaning and length of streams, and have the potential to rush to the Bohai Sea. The complex water environment is mixed with mud and sand; lakes have the depth of the sea, and contain infinite life.
Concept: The rivers and lakes are like the moon, with its waxing and waning phases