This pair of couplets was written by a famous calligrapher. It is beautifully written and can be seen from the lines that it is a master masterpiece. Carving bats on couplets means happiness is just around the corner, and carving leaves on couplets means prosperity.
Intermediate duality; Immortals support Yun Heci, and ancestors are rich and blessed.
Moral of scripture: God bless and bless forever.