The batch number at the bottom of tf lipstick is related to the production date. The first number represents the year, from 0 to 9 represents the last ten years, the second number represents the month, and the numbers 1 to 9 represent the first nine months. ABC stands for 10, 1 1 and 12 respectively. You can also enter the batch number at the bottom of tf lipstick to enter the website dedicated to querying the batch number of cosmetics production, or you can query the production date of tf lipstick.