The bridge across the River Amur will connect the cities of Blagoveshchensk in Russia’s far-east region and Heihe in north-eastern China.
It is intended to increase the volume of freight traffic and agricultural products between the two countries.
The road is expected to open in spring 2020, Russia’s Ministry for the Development of the Russian Far East and the Arctic said.
“We are forming a new international transport corridor,” Vasily Orlov, the Amur region’s Governor, said.
“It will allow us to fully reach our transit potential.”
Mutual wariness and Russian fears of expanding Chinese influence in the sparsely populated but mineral-rich far east have stymied such development in the past.
But Russia sought to step up ties with China after the West imposed sanctions on it over its annexation of the Crimea peninsula from Ukraine in 2014. On Monday the two countries’ presidents are also due to launch the Power of Siberia natural gas pipeline, a 30-year, $US400-billion ($590 billion) deal.
Kremlin spokesman Dmitry Peskov hailed the “special relationship” between the two countries in October, while Russian President Vladimir Putin has spoken of his strong working relationship with China’s President Xi Jinping.
Construction of the bridge was undertaken by a Russo-Chinese company and involved building 20 kilometres of new roads.
The Chinese side of the bridge was completed in October 2018, but the Russian side took longer to build and cost more — about 13.6 billion roubles ($312 million), compared to 5.2 billion roubles for the Chinese section.