Cheng (/tʃəŋ/) can be a transcription of one of several Chinese surnames. Since the syllable Cheng represents different sounds in Hanyu pinyin and the Wade–Giles systems of Chinese romanization, some ambiguity will exist as to which sound is represented by the letters "Cheng" if the romanisation and tone is not known. Also within each system of romanisation, each syllable can represent one of several different characters, as with any Chinese syllable. In the pinyin system of romanization (usually used in China), the most common surnames romanized as Cheng are 程 and 成.