There are many kinds of butterflies in China, Dali and butterfly spring. Every spring from March to May, there are countless butterflies as big as palms and as small as bees hanging in strings on acacia trees by the spring. April 15 was designated as the butterfly society by the Bai people. Xu Xiake once described it in his travels: "There are thousands of real butterflies hanging from the top of the tree to the surface of the spring with their feet hooked." Guo Moruo, a famous poet, wrote a poem when he visited butterfly spring in Dali in the autumn of 196 1, "There are thousands of butterflies flying in butterfly spring, with their heads and tails connected several meters, and their inflorescences hanging from the trees." One said that the butterfly was hooked with its feet, and the other said that the butterfly was connected end to end. Neither scholar saw the spectacle of butterflies hanging in strings under the tree in spring, because their time was different. Which statement is closer to the details depends on the tourists themselves. Butterflies don't fly around butterfly spring all the time. Except for a few days in April every year, you can't see this spectacle at other times. If you happen to miss the butterfly club, don't feel sorry. The newly-built Butterfly Pavilion to the south of butterfly spring truly reproduces the ecology, species and butterfly culture related to butterflies in butterfly spring, and provides valuable information for tourists who can't visit the Butterfly Club to understand the wonders of butterfly spring.

Butterfly spring is located at the foot of Yunnong Peak in Diancang Mountain, Dali. It is like a transparent gem, embedded in the shade, attracting tourists from far and near with its unique wonders. The formation of butterfly spring is related to the environmental conditions in this area. The spring water faces Cangshan Mountain in the west and Erhai Lake in the east. Cangshan is tall and straight, like a screen, with snow on the top and crystal clear in summer. Clouds gather and rain grows, precipitation is abundant, and trees and grass are all soldiers. Erhai Lake, with a total area of about 240 square kilometers, has beautiful scenery and flowers, and the four seasons are like spring. Cangshan Mountain and Erhai Lake not only provide the beautiful scenery of "Silver Cang Yu Er" for human beings, but also the scenery of butterfly spring constitutes a natural environment for butterflies and other insects to multiply and grow in large numbers.