The rich man takes a step back, as if Zhang has punched him in the chest. 
His mouth is open, revealing flawless white teeth, his eyes are not focused. 
After a few moments, he takes another two steps back, which gives him enough 
room for his next maneuver: He stoops, puts one knee down, then the other, 
bends forward at the waist until he is on all fours, then settles himself down 
full-length on the nicely interlocked paving-stones. He puts his face on the 
pavement. He kowtows to Zhang Han Hua.