Located close to border region pivotal in war with Japan, experts say the pass was used to exchange intelligence.
Plans to remove barbed wire from migration route would allow safe passage and help boost numbers of tigers and leopards.
Deputy premier Dmitry Rogozin looks to Asia as China confirms $5 billion boost for Russian Far East.
Paws were attached to underside of carriage in Zabaikalsk region.
Ambitious plans unveiled for 250km/h train that would cut travel times and drive new business and tourism between two countries.
Altai route for gas to China could take priority, reported Reuters.
Kuzya's GPS tracker shows he has returned to his motherland.
A weekly holiday season flight is staring to the historic and formerly Russian-controlled city of Dalian in China on 4 July.
Fears for plan to stimulate Russian economy via major infrastructure links to Asia and Europe as Beijing announces rival scheme.
Macabre cargo including 37 elk lips impounded after FSB tip-off. CAUTION: STRONG IMAGES