The season’s biggest races start in less than a month at a venue that is by all accounts well-designed, but also has yet to host an official FIS race. Here’s some of what is currently known about the National Cross-Country Skiing Centre in Zhangjiakou, 100-plus miles northwest of Beijing in the Hebei province of China. The Courses The races will be held at altitude. The stadium is located at an elevation of roughly 1,650 meters...