What is the second line between mountains and rivers offering auspiciousness?

The second couplet of this poem is that the sun and the moon are shining brighter than each other.

“Mountains and rivers strive to offer auspiciousness, and the sun and the moon are more brilliant than each other.” It comes from the poem "Grain Rain Feelings". The author is Zou Xinshe, a member of the Baoji Essayists Association.

The full text of the poem is Grain Rain sends spring back, and the cold wave will return on its own. Mountains and rivers compete for auspiciousness, and the sun and moon shine more brightly than each other. The fragrance is gone, the remaining flowers have fallen, and the branches are full of vegetables and fruit. If people are diligent and not lazy, God will always be with them.