A train pulls over during its trial run at the Michurinsky Prospekt station in Moscow, Russia, Dec. 2, 2021. A new section of the Moscow Metro, part of which was built by China Railway Construction Corporation Limited (CRCC) was launched on Tuesday. It was the first time for Russia to introduce a Chinese enterprise in its metro construction, which was also marked as the first metro project of a Chinese company in Europe. (Photos: Xinhua)

A child holding a metro ticket with a view of Michurinsky Prospekt station printed on it poses for a photo in Moscow, Russia, Dec. 7, 2021.

Passengers walk at the Michurinsky Prospekt station in Moscow, Russia, Dec. 7, 2021.

Photo taken on Dec. 2, 2021 shows a view into a section of a tunnel at the Michurinsky Prospekt station in Moscow, Russia.

Workers walk at the Michurinsky Prospekt station in Moscow, Russia, Dec. 2, 2021.

Photo taken on Dec. 2, 2021 shows a view at the Michurinsky Prospekt station in Moscow, Russia.