The change trend materials related to the quality of Oolong tea during thestages of manufacture and its differances between the edge and the middle of the secondleaves during the leaf-doing were investigated respectively.In addition,factors affecting theappearance of manufactured tea were studied.The results show that the taste materials ofOolong tea were polyphenol,catechins,amino acid,soluble sugar,TF,TR and TB.Thecolour materials were chlorophyll,TF,TR,TB and anthoxanthin.The appearance of Oo-long tea was affected mainly by the process of Ro...