First cross-river railway bridge between China and Russia completed
https://edition.cnn.com/travel/article/tongjiang-china-russia-bridge-complete-intl-hnk/index.html
High speed railway network in China is approaching the border between China and Russia. So, it would be probable for high speed train to run through Russia. But, due to difference of rail gauge between these 2 nations, it will be impossible for each train to directly run through major cities in Russia like Khabarovsk.
