At 3:30 a.m. every morning, bakers in Fuqing, China, start prepping Guang Bing, a bagel recipe that helped Chinese troops win a war. Five hundred years ago, a general needed a recipe that his troops could eat on the run. Though the recipe has survived to today, the tradition of making the bagel is fading away. For now at least, the last Guang Bing baker in his village still practices this centuries-old craft.