The study is a spectral analysis of the vowels and syllabic approximants in Beijing Mandarin. It presents: (i) the average F1, F2, F3 values for the resonant sounds, (ii) the vowel ellipses for the resonant sounds, showing their relative positions in the F1/F2 plane, (iii) the vowel diagrams, showing the F-patterns of the first three formant frequencies of the resonant sounds, (iv) the formant trajectories for the rhotic schwa, showing that the vowel in the V syllables is actually a sequence of a plain schwa and a rhotic schwa, and (v) the diagrams of the average vowel positions for the vowels followed by a nasal ending, showing that the effect of the nasal ending on the F1 and F2 of the vowel sounds varies accoring to vowel type and nasal type.