Overcoming peak obstacles

Erik Nilsson joins the bangbang army and hops on hogs with the elderly China Knights motorcycle club to discover how Chongqing has blazed paths to tame its infamously hilly terrain.

Editor's Note: This is Part 5 of the six-part Yangtze-diaries series based on journalist Erik Nilsson's recent 35-day, 2,000-kilometer journey to 11 cities to discover how the Yangtze River Economic Belt has transformed over the 40 years since the reform and opening-up. Scan the code to watch the video.

I was recently recruited into the bangbang army and rode with a motorcycle club of grandpas - and a few grannies - in Chongqing.