Russian President Vladimir Putin and Chinese President Xi Jinping at St. George's Hall in the Kremlin on March 21, 2023.Xie Huanchi/Getty Images Russia plans to spend $4 billion improving railroad connections with China, Bloomberg reported. It's evidence of stronger ties between the two countries, as bilateral trade has soared. The rail lines require improvements as they're beset by logistical issues and bottlenecks. Moscow is doubling down on its trade partnership with Beijing, outlining plans to invest billions in two key rail lines, Bloomberg reported.