the logo of the 6th edition of Lute contains 221 because the bottle storage year of the 6th edition of Lute is 6 years. The production year of the 6-edition Lute wine is 215, and the bottle storage year is 6 years. After the bottle storage for 6 years in 215, it will be 221, and it will be sold in 221. The trademark will be marked with the word 221. Therefore, the logo of the 6th edition of Lute contains 221 because the bottle storage year of the 6th edition of Lute is 6 years.