It's an engineering feat that could make the great wall look small: a high-speed train from China to the U.S.
According to a report in the Beijing times, Chinese officials are considering building a high-speed rail line that would start in northern China, go up through Russia and connect through Canada into America.
The proposed line would be more than 8,000 miles long. That's like travelling from New York to Los Angeles almost three times.
It would have an underwater tunnel that stretches 125 miles - four times longer than the tunnel connecting England and France.
CNN's Tom Foreman takes a closer look at how the construction of high-speed rail from China to the U.S. could be done.