Since 19 December 2003, Chen Si has spent every weekend on the Nanjing Yangtze River Bridge, a notorious spot from which to commit suicide.
To Chen, these are people "who look depressed, those whose psychological pressure is great" and whose "way of walking is very passive with no spirit, or no direction.
For example, Chen helped Shi Xiqing, a man who tried to commit suicide because of the $15,000 bill for his daughter's leukemia treatment, by phoning him every week and talking to his creditors.
"[3] A German TV program also reported about Chen Si preventing suicides.
[6] Filmmakers Jordan Horowitz and Frank Ferendo released a documentary film about Chen in 2015 called Angel of Nanjing.