Added relation for Lanxin railway from Lanzhou to the border of Kazakhstan.

Now I'd like to have a nice topo background a la google terrain showing the rendered rail and upload it to wikipedia - but the result of http://betaplace.emaitie.de/webapps.relation-analyzer/osm.jsp?relationId=163418 doesn't looks very promising if you zoom out and choose CycleMap to display the map...

Such a osm-service is still missing and would be very good: something which would be worth to upload to wikipedia. If relations have a smaller diameter the CycleMap can produce some nice looking map (if the region is covered) but for more than 1000 km distance there is nothing appropriate...