In the weekend I began my quest to explore the Great Wall in Liaoning.
I selected this area from Google Earth: 40°15'34.48"N 119°59'12.73"E. The local people confirmed that this is an old part of the Great Wall and told me there should be a path leading to the wall. Unfortunately I was not able to find the path - mainly because of fields covered with 2 meter high crops (corn) so it was very difficult to judge where to go and the weather also began to turn bad.
It seems large parts of the GW in this area have disappeared since the Google Earth picture was taken, since I was unable to locate any GW close to the road - but this might have been hidden by the crops.
I will return later in another time of year to try to find the way up.
Earlier that day I visited the old fortified city of Qiansuo (40° 5'35.38"N 119°56'45.39"E). Please see my Panoramio account to see the pictures from there:
http://www.panoramio.com/user/1270960