The tracks under the world’s first commercial magnetic-levitation train are sinking, possibly threatening the £750 million Chinese project, a newspaper reported in Shanghai today. The 270 mph “maglev” began regular operation this year, linking Shanghai’s new international airport with its eastern financial district. “We have been aware of the sinking of our maglev track,” Xia Guozhong, a spokesman for the company running the project, said. The Shanghai Daily gave no details of the sinking and it was not clear how it would affect operations. The tracks are sinking “very slightly,” said Xia. A spokeswoman for the Shanghai city government said...