Originally Posted by
thyeri
The extension to Hangzhou was finally approved in March 2010, with construction to start in 2010 [5]. The new link will be 199.5 km (124 mi) long, 24 km (15 mi) longer than the original plan. The top speed is expected to be 450 km/h (280 mph) but limited to 200 km/h (120 mph) in built-up areas.
^
I think there has been a translation error somewhere. The original report in Chinese says that they're still doing studies on the project so construction isn't likely to start any time soon. There has been no reports since March so one would presume that it's on the back burner.