The initial summer day was ＜Summer Begins＞.
It meant grain which sowed in spring was ripe.
Peach and plum trees had harvest and phoenix tree bloomed.

A boy of the "summer begins"danced happily and used a fan to wave and blew phoenix tree,dropping white leaves as snow.

People invoked rainfall in "summer begins"for harvest grain. If it was rainy, the summer came.