The Yangtze River Bridge in Nanjing is one of the most famous bridges in China. It is also the most popular place in the world to commit suicide. For the past 11 years Chen Si has been patrolling this bridge, looking to provide aid for those who've gone there to end their lives. Incredibly, he has saved over 300 people since he began - nearly one every two weeks.

Every year many thousands of people visit the mighty Nanjing Yangtze Bridge. Every year dozens of them have no intention of leaving the bridge alive. But there is one person determined not to see them plummet to their deaths: Chen Si. For some 13 years now he has sacrificed every free weekend to patrol back and forth across the bridge on his motorcycle.