You can choose to go to Sichuan lark speech training center. Their institution is a professional institution that specializes in language training and pronunciation correction for children, adolescents and adults with language retardation or unclear pronunciation. Mainly carry out stuttering correction, dysarthria correction, cleft palate speech correction, hearing impairment speech rehabilitation, autism rehabilitation training, developmental retardation rehabilitation training. My child has dysarthria. Put dtzcszhchsh back before to make gk. After more classes in their family training 10, I saw the effect. It seems that it is most reliable to find a professional pronunciation teacher to correct pronunciation.