Construction of the 1,318-km-long Beijing-Shanghai high-speed railway began on April 18, 2008, with total investment of 220.9 billion yuan. Its top speed is expected to reach 350 km per hour (220 mph), cutting the travel time between Beijing and Shanghai from 10 hours to 5 hours. A batch of advanced and environmentally friendly technologies will be used on this railway, including high-speed welded and ballastless wheel technology, shock absorption technology, noise reduction, low energy consumption and less electromagnetic interference.