The smog has rolled into Beijing. Day after day, the city is enshrouded in a depressing grey haze and an air of toxicity lingers about. Once in a while, we’d get lucky and there’ll be a hint of sun, a peek of blue skies. Only then do we feel safe to venture outdoors for a much needed stroll without the precautions of an unsightly M3 mask. On these days, I’d go to the community park to use the exercise equipment or…