Because, in the feudal society of China, both the people and the imperial court pursued "auspiciousness". All animals and birds, exotic flowers and exotic trees, as long as any shape, sound and meaning can show happiness, health, peace and auspiciousness, can be used by us, so "mascot" has become a unique cultural phenomenon.
but
The symbolic meaning of bats
Bat mammals. Also known as fairy mouse and flying mouse. It looks like a mouse, and its front and rear limbs are connected with the body by a film. It flies at night and preys on mosquitoes, ants and other small insects. (Tang) Yuan Zhen's poem "Long and Beautiful Mid-Autumn Festival": "The curtain breaks the firefly, and the window shows the bat flying." Bat province is called "Bat". Because "bat" and "fu" are homophonic, people use bats to express auspiciousness, which is auspicious. There are five bats in a folk painting called five blessings.
Therefore, longevity is an auspicious language widely used by the people. Therefore, bats and peaches symbolizing happiness and longevity are often used together to form auspicious patterns. Such as "immortality", that is, a bat, two peaches and two ancient coins. "Shuang Quan" is a homonym for borrowing two ancient coins. This is an auspicious word, representing happiness and longevity. Another: A bat came with a peach in its mouth and auspicious clouds. The homophonic pattern symbolizes that happiness and longevity are coming, that is, happiness falls from the sky.
So the symbolic meaning of bats is bliss!