For any frequent PEK travelers who travel on business class etc., have people noticed in T3 that the priority security line no longer accepts business class or first class passengers?

There was a separate secondary security line (after passport control) for the X-ray machines, etc., on the far left of the T3 departure which had a shorter queue. There were two lines for a while, one for business and first class passengers and the other one for families with children, etc.

Does anyone know the reason? Just curious, as I do this run about 1x a month.