same as Mandarin. Chongqing dialect with 45 districts using has 20 initials, 5 initials do not exist: , , , , ; Chengdu dialect with 77 districts using has 21 initials, 4 initials do not exist: , , , . The following is the initial consonant inventory of Chengdu-Chongqing dialect: In particular, the consonants of Chengdu are comparable but not identical to those in Mandarin. See the inventories below: Final A final, the remainder of syllable after the initial, consists of an optional medial glide, a vowel and an optional final consonants. There are 42 types of finals in Sichuan dialect; four Sichuanese finals do not exist in Beijing: , , , and . On the other hand, three Beijing finals do not exist in Sichuanese: , , and . Chengdu dialect with 62 districts using has 36 finals, Chongqing dialect with 37 districts using it has 37 finals. The following is the inventory of Sichuanese finals, transcribed in the International Phonetic Alphabet: Vowels and consonants Tones of Chongqing-Chengdu dialect is very similar, but not the same as that of Sichuanese. About one third of Sichuan dialects have special entering tone, with a relatively independent set of finals, eg: , , , , , , , , , , etc. These vowels keep the throw tight, ensures the muscles of the larynx and oral cavity tense during pronounce, so that the entire syllable exhibits a rough and tight state. The vowels in Chengdu are given below: The following table shows the tense vowels of Chengdu-Chongqing dialect, and a comparison with other Sichuanese dialects: Literary and colloquial readings of Chongqing-Chengdu dialect Affected by Mandarin for a long time, literary and colloquial readings appears in Chongqing-Chengdu dialect. Colloquial readings is usually the inherent reading style from ancient Sichuan dialect, mainly appears in high-frequency everyday communication; Literary readings are close to modern Mandarin, normally appears in written language. The literary and colloquial readings have been developing in the recent decades. However, affected by the promotion of Mandarin Chinese by the Chinese government, literary readings are becoming dominant, and some pronunciations have the tend to disappear. Literary and colloquial readings of Chinese character in Chengdu are shown below. Note: the table is only based on 《成都语音的初步研究》in 1958, the changes of Chengdu dialect in recent years are not considered: Vocabulary As a branch of Sichuanese, Chengdu-Chongqing dialect is mainly composed of three parts: ancient Ba-Shu