Not sure about exact definition of fast track is
but seems this place offers their version.
Services in Beijing (PEK)
Fast Track. For Arrivals you are met at or near the air-bridge, fast-tracked through immigration, helped with recovering your bags, escorted through customs and taken to your driver in a special VIP area (for which we need your car number plates in advance if you use a hotel provided or third party vehicle). For Departures you are helped with check-in, fast-tracked through immigration and accompanied to your lounge and/or to your gate.
http://www.shanghaifasttrack.com/beijng.htm