This afternoon when I was riding on subway to Shipai, en route to Veteran General, I saw a gaggle of four foreigner passengers, two men and two women, were talking with so clamorous pitch and unscrupulous manner that it seemed no other passengers around in the cabin.  You know, I have some hearing problem, so I could not tell what language they were using and what were they talking about.  But all I knew was the noises they made were totally intolerable at all. 

All of a sudden, I saw a graceful lady of nearly 40 stood up and approached to those foreigners, trying to stop them.  Apparently, she could not communicate with them in whatever foreign language, but with gentle gestures and friendly smiles, in no time she calmed those noisy dudes down.  When I got off the tram at very next stop, I signaled to her with my thumb up as a salute.

P.S.  Chinese people are usually inhibited in dealing with a situation like that, especially when there are foreigners involved.  I did try to stop those guys myself, but when my wife, who sat next to me, knew my intention, she stopped me.