You didn’t notice that there is a BIN in front of it, which is BIN 128 and BIN 389. In fact, it is a kind of number, often translated as "Wine Cellar 128"...

Because it is like Ben Large wineries like Fu usually have many product lines, with different varieties of grapes, different brewing processes, and of course, different prices, so they are distinguished. Some of the wineries in a series are assigned numbers to the wine cellars.