In this paper, we argue that the issues on the status of Chinese medial can be judged by acoustic criteria. The issues we discussed are whether the medial of Chinese languages occupies a timing slot, and which part of syllable the medial belongs to, the onset or the rhyme. The acoustic criteria are: 1. Whether the medial has a stable stage as its first part; 2. If it has, where the stable stage ends, ends at the same point as the initial ends, or exceeds that point; 3. Where the glide stage of the medial ends; ends at the same point as the fricative initial ends, or exceeds, or does not begin at that point. We also point out that, there are correspondence between phonological criteria and acoustic criteria. Although there are different opinions on the medial status of some Chinese dialects under the traditional phonemic theory, the divergent view never beyond two acoustic scales. From the multi-linear point of view, the association of medial and tone can be a phonological criterion in question.