China Railway
Two-thirds of Chinese side already completed, but delay in Russia prompts call from Kremlin to speed up work on other side.
Answer: The Trans-Siberian Railway, according to international broadcaster CNN.
33 hour journey between the capitals could be in place by 2020.
Ambitious plans unveiled for 250km/h train that would cut travel times and drive new business and tourism between two countries.
New four times a week link between Beijing and Vladivostok.
'Turn to the East', which started a year ago, is gaining popularity
Japanese companies consider investment in railway extension via islands of Sakhalin and Hokkaido.
Fears for plan to stimulate Russian economy via major infrastructure links to Asia and Europe as Beijing announces rival scheme.
Possible route could see 400km/hour bullet train pass through heart of Siberia and Altai region with stops in major cities.
Sent to Siberia
Born in Siberia
