the figures below the production date of Yili Chang light yogurt represent the production date and batch, as well as the production shift and origin. The specific meanings are as follows:

1. The production date of Yili Changqing yoghourt is usually marked as: year+month+date+batch and shift and place of origin.

2. For example, this string of numbers "2174A". Where "2" stands for year, "1" stands for month, "7" stands for date, "4" stands for batch, and "a" stands for shift and origin.

The above is the specific meaning of the numbers below Yili Chang Light Yogurt. I hope I can help you.