In Huang Shan (黄山), you can see many carriers (挑夫) who carry foods, drinks, construction materials.  A car
rier usually carries about 60-100 kg in his uphill trip.  It is really a kind of hard work 工作相当艰辛.  In A
ug. 2006 when I visited Huan-Shan, I 'hi-jacked' a carrier and helped him for about 200 meters (about 75 kg).