50,000 km of defiant rail engineering

While every nation builds railways, China has carved its network through some of the most formidable landscapes on Earth: relentless deserts, frozen plains, active earthquake zones, unstable plateaus, and mountains that defy straight lines. Now, having surpassed the monumental milestone of fifty thousand kilometers, it is time for a reality check on the past, present, and future of Chinese high-speed rail. On the show: Niu Honglin, Steve & Yushun