It's that time of year again. The Spring Festival transportation 春运 rush is in full swing. If you haven't yet seen this fine documentary film about it, now would be a good time. 130 million souls are "going home," many carrying those huge woven bags stuffed with bedding, a few clothes, and some presents. For many factory workers at the lower end of the socioeconomic scale, this is the only time all year they can see their elderly parents and young children who were left back in the village when they went away to work 打工 in the big city factories