In the Hanyu Pinyin system, finals like -i, -ia, -ie, -iao, -iu, -ian, -iang, -in, -ing, -iong, -ü, -üe, -üan, -ün can also go as stand-alone syllables. They are then written with a “y” at the beginning, namely: “yi”, “ya”, “ye”, “yao”, “you”, “yan”, “yang”, “yin”, “ying”, “yong”, “yu”, “yue”, yuan”, “yun”.