On a sweltering August morning in the northern outskirts of China’s capital, tour guides lead parties of visitors down a narrow shaft into a cool network of tunnels under the village of Jiaozhuanghu. A notice at the entrance explains that, beginning in 1943, local Communist guerrillas dug the tunnels to provide sanctuary and conceal their movements in the hit-and-run war against patrolling Japanese troops. A section of the tunnels, restored and enlarged for the visitors, connects firing positions, underground meeting rooms and field kitchens. Full Story