【Pinyin】Unit 8-Differentiation 3: alveolar nasal “n” and velar nasal “ng”A-monthly/yearly members, Introductory Course
【Pinyin】Unit 6-Differentiation 1: initials j,q,x and z,c,sA-monthly/yearly members, Introductory Course
【Pinyin】Unit 5-Pronunciational rule 2: Tone Marking and AbbreviationA-monthly/yearly members, Introductory Course
【Pinyin】Unit 4-Pronunciational rule 1: Tone Sandhi : 3rd tone+3rd toneA-monthly/yearly members, Introductory Course
