The four tones of Pinyin.普通话语音的四声是指阴平、阳平、上声、去声四个声调 阴平 (of Chinese phonetics) a classical name for the 1st tone 阳平 (of Chinese phonetics) a classical name for the 2nd tone 上声 [Phonetics] the falling-rising tone (in Chinese pronunciation) 去声 [Phonetics] the falling tone (in Chinese pronunciation)