A "tencent piece" refers to a small denomination of currency, typically 1/10th of a Chinese yuan. Synonyms for this term include "jiao", "mao", and "fen". Jiao is widely used in China and has been in circulation since the introduction of decimal currency in the 1950s. Mao is another term used interchangeably and is derived from the portrait of Mao Zedong that used to appear on the front of the notes. Lastly, fen is a term used for fractions of a yuan and is commonly associated with smaller monetary amounts. All of these synonyms represent different divisions of the Chinese currency, reflecting the diversity and practicality of its monetary system.