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What is the highest level of Guangzhou Tobacco Certificate?

The highest grade of Guangzhou Tobacco Certificate 15. According to relevant public information, the retail customers of Guangyan Certificate are divided into 15 grades, namely A 1, A2, A3, A4, A5, A6, B 1, B2, B3, B4, B5, B6, B7, C 1 and C2.