 The precise time at which the loss occurred is unknown though it was likely gone by the time of the Qing Dynasty, in the 17th century.The entering tone is extant in Jianghuai Mandarin and the Minjiang dialect of Sichuanese.In other dialects, the entering tone has been lost, and words that had the tone have been distributed into the four modern tonal categories, depending on the initial consonant of each word.