with American Airlines and UAL. No question asked whenever I use their lounges. Every time I fly with Shanghai Airlines as a First Class passanger, they offer me delicious foods plus some gifts. But last month when I tried to use their lounge I lost the piece of paper saying which lounge I could use. Two MMs 拷问 me for 15 minutes before letting me in. I also have found out those who taking care of first class passengers have at least 10-year working experience (for airlines in China). For American airlines, it seems to me they have at least 30-year experience!! older than my 老妈。