in Taiwan starting in the mid-1990s. In December 2004, the first survey of language use in the People's Republic of China revealed that only 53% of its population, about 700 million people, could communicate in Standard Chinese. This 53% is defined as a passing grade above 3-B (a score above 60%) of the Evaluation Exam. This number increased to over 80% by 2020. With the fast development of the country and the massive internal migration in China, the standard Putonghua Proficiency Test has quickly become popular. Many university graduates in mainland China take this exam before looking for a job. Employers often require varying proficiency in Standard Chinese from applicants depending on the nature of the positions. Applicants of some positions, e.g. telephone operators, may be required to obtain a certificate. People raised in Beijing are sometimes considered inherently 1-A (A score of at least 97%) and exempted from this requirement. As for the rest, the score of 1-A is rare. According to the official definition of proficiency levels, people who get 1-B (A score of at least 92%) are considered qualified to work as television correspondents or in broadcasting stations. 2-A (A score of at least 87%) can work as Chinese Literature Course teachers in public schools. Other levels include: 2-B (A score of at least 80%), 3-A (A score of at least 70%) and 3-B (A score of at least 60%). In China, a proficiency of level 3-B usually cannot be achieved unless special training is received. Even though many Chinese do not speak with standard pronunciation, spoken Standard Chinese is widely understood to some degree. The China National Language And Character Working Committee was founded in 1985. One of its important responsibilities is to promote Standard Chinese proficiency for Chinese native speakers. Phonology The phonology of Standard Chinese is based on Northern Mandarin in mainland China, Taiwan, Singapore, and Malaysia, while in Hong Kong and Macau, it is based on Cantonese. Here, the Mandarin-based phonology shall be described. The usual unit of analysis is the syllable, consisting of an optional initial consonant, an optional medial glide, a main vowel and an optional coda, and further distinguished by a tone. The palatal initials , and pose a classic problem of phonemic analysis. Since they occur only before high front vowels, they are in complementary distribution with three other series, the dental sibilants, retroflexes and velars, which never occur