In order to avoid bias in research, we employed NK-Biotek Company (Ho Chi Minh City, Vietnam) to perform the sequencing analysis of 28s rRNA and 16s rRNA for yeast and AAB strain, respectively. The whole cultures of yeast and AAB strain on the agar plates were sent to this company and the obtained sequences were sent back to us as the results. Finally, we analyzed and compared the results using BLAST software http://blast.ncbi.nlm.nih.gov/ Blast.cgi to figure out the specific name of each strain.