Chen's spelling is based on Putonghua Pinyin, and Chen's spelling is based on Vitoma Pinyin.

Witomar Pinyin Method:

1, which started at 1867, was called "Wei's Pinyin" by Wade (1818-1895) and others.

2. Wade was British Minister to China in 187 1 and returned to China in 1883. 1888 was a professor at Cambridge university, 1895 taught Chinese until his death. He used the Roman alphabet as the phonetic symbol of Chinese characters and founded the Wei's Pinyin method. Later, H.A.Giles was slightly modified, and it was collectively called WG Wade-Giles system. Its greatest advantage is that the aspirated initials are represented by the aspirated symbol (').

3. 1958 Before the Chinese Pinyin Scheme was popularized in China, Weimar Phonetic Alphabet was widely used for phonetic notation of names and places, which had a great influence. 1958.

4. Except for a few occasions where cultural traditions need to be maintained, Chinese mainland is basically not used.

5. Except for some proper nouns, such as Yijing and Taiji, English names such as Peking University, Tsinghua and Suzhou University are all postal pinyin, while Sun Yat-sen is Cantonese pinyin, not Weitoma pinyin. Of course, postal pinyin is based on Wei Doma's pinyin, with the addition of simplified gas-conveying symbols in the late Qing Dynasty.