http://www.youtube.com/watch?v=5YO4J3Qm6LI
The construction of the crane that can lift 20,000 tons. its height is 118 meters. It cost Chinese around 40 milliom US$.
http://www.youtube.com/watch?v=rU1Y6-n4TZE
We use it in building offshore oil rigs. The construction period can be shorten by about 30% and much cheaper since large modules can be built separately and installed on the rigs here.