but it is all different now in the city of liping.ngs' grandchildren have to walk just a few hundred meters to their new school. for many families from the countryside, access to better education is an important reason to move to the city. the school in liping may not be the best, but it is better than in their village. morning assembly is modelled on rituals observed in schools in beijing. her teacher says anhui had to do some catching up when she started, but she is now doing much better. long guoyuan appears to have found his feet fast in the city. he invested his savings and his children's money in an electric tricycle truck. now he is waiting for work. >> the first thing i did here was buy this vehicle. it will be useful once i have my own business, and now i can transport things for other people. i earn dozens of yuan a day. here, we can buy what we want. in the village, we could not buy anything. even if we had money. life here is so much better. >> long guoyuan earns the equivalent of 250 euros a month. his sons living far awa

archaeologist william lipe. i'm not sure what it means, but i can speculate that the burning of the kiva roofs was some type of closing down ritual for this village. we've seen that a few other places in the northern southwest at a time when there was a substantial movement of population out of an area. so i think that's a possibility -- that they burned, intentionally burned, the kivas when they left this area for good. keach: to find out when the site was abandoned, a charred roof beam is wrapped and sent to a laboratory. the anasazi often moved their villages, but usually only for a short distance. lipe: ordinarily when the anasazi left a settlement, they took most of their material equipment with them. if they weren't going very far, they might even take the roof beams. sand canyon pueblo is really different. this is a little rectangular ceramic box found in the niche in the kiva, probably left right where it was ordinarily left when they abandoned that part of the site. valuable little things like this ordi