It’s a few minutes before practice, and helmets and pads are heaped on an Astroturf field hard by Beijing’s smog-choked Fourth Ring Road. The sound of pre-training hip-hop from a nearby boombox merges with whirring angle grinders from the metalwork shop next door. Duane Brooks, wide receiver for the newly minted Guangzhou Power, is showing off his latest accessory: a plushy panda hat.