There are thirteen sets of Bailing sets in total. The first nine sets are front sets, and the last four sets are rear sets. When whistled, the front and rear sets are often connected together, and rarely they are whistled separately.

The thirteen sets are: ① house sparrows in the forest, ② mountain magpies, ③ reds, ④ flocks of chickens, ⑤ wild whistles, ⑥ small swallows, ⑦ cats, ⑧ house magpies, ⑨ harriers, which are for Front set. ⑩Indigo chin rui'er, 11 oak trees, 12 yellow bird sets and thrush luo'er, 13 Hu shrike mating children, are the back sets.

The Bailing set needs explanation. One is "house bird noisy forest". To call "house sparrows in the forest" is a mistake that goes a long way. There are many house birds in the house, and in the morning they make a lot of noise among the trees in front of the garden, which makes me understand the difference between "noisy and noisy".

The second is Hongzi, which is called Hongzi’s various languages.

The third one is a flock of chickens, which refers to the echoing sounds of hens and roosters, which is natural and interesting, and does not refer to the crowing of roosters. The fourth is the whistle, some say it is the sound of a whistle being blown at the mouth, some say it is the "tiger roar", the roar of a tiger, and some say it is the "pot whistle", the sound of the boiling water blowing the spout of the pot. Experts say that there are three kinds of distinctions. Which one is correct still needs to be decided by experts.

The fifth one is swallow, which can be divided into "swallow in the sky" and "swallow in the sky". The swallow in the sky is the song of the little swallow when it is flying, and the sound is "zizi, zizzi". "Rao Yan'er" is the call of the little Yan'er when it settles down, and the sound is "a few pulls, a few pulls! A few pulls, a pulls".

Each Bailing set is not a single tone, but has many matching tones, so it is called a set.

The sixth is the indigo chin rui'er, which sounds like the whistle of "lost child! lost child" made by a person bending his tongue and blowing lightly.

The seventh one is Yellow Bird Set and Thrush Luo'er. Thrush Luo'er is what is called Taozi, and it can also be called the sound, because except for Bailing, all the Northern Birds are called Taozi, such as Hongzi Taozi and Yellow Bird Taozi. There is no certain order for the whole set. Just because they are often called in several languages, they are naturally called so-and-so sets. In fact, they are quite different from Bailing sets.

The eighth is Hu Biao'er, the common name of Hu Bulao in Beijing is "Hubula", the third tone (i.e. the upper tone) of pulling is pronounced, the tail of Jiao'er is pronounced as Yi'er, and the Beijing sound pipe tail is called Yiba. Hublot's mating sound is the bird's mating and mating call in spring and autumn, and the sound has the double sounds of "Zhaza" or "Zhazha".

The last set of Bailing sets makes these two double and sudden sounds. Quite consistent with the tonal pattern. It seems that the person who originally invented these thirteen sets of tones must be a mediocre person.

Bailing can be divided into "qingkou" and "qingkou". Qingkou has the sounds of dog, car and eagle. Such sounds are not allowed in the clean mouth, so it is extremely difficult to pronounce words.

There are many clear-mouthed larks in Nancheng, so dogs, cars, eagles and other sounds are allowed. Beicheng pays attention to keeping a clean mouth, so the sound of water wheel is regarded as wrong, which means dirty mouth. The most taboo mistake of Bai Ling is "jing boudoir", which is the sound of "guala, guala" made by the iron plate shaken by the sharpener. The second is the noise caused by crows.