Hamburg-bound China-Europe freight train departs from C China's Zhengzhou

This photo taken on July 18, 2023 shows a China-Europe freight train bound for Hamburg, Germany at Putian Station in Zhengzhou, capital of central China's Henan Province. Zhengzhou has handled 7,572 China-Europe freight trains which have carried 670,000 twenty-foot equivalent units (TEUs) of cargo since July 18, 2013. (Xinhua/Dai Qiaochu)

A China-Europe freight train bound for Hamburg, Germany waits for departure at Putian Station in Zhengzhou, capital of central China's Henan Province, July 18, 2023. Zhengzhou has handled 7,572 China-Europe freight trains which have carried 670,000 twenty-foot equivalent units (TEUs) of cargo since July 18, 2013. (Xinhua/Li Jianan)

A China-Europe freight train bound for Hamburg, Germany waits for departure at Putian Station in Zhengzhou, capital of central China's Henan Province, July 18, 2023. Zhengzhou has handled 7,572 China-Europe freight trains which have carried 670,000 twenty-foot equivalent units (TEUs) of cargo since July 18, 2013. (Xinhua/Lu Peng)

A China-Europe freight train bound for Hamburg, Germany waits for departure at Putian Station in Zhengzhou, capital of central China's Henan Province, July 18, 2023. Zhengzhou has handled 7,572 China-Europe freight trains which have carried 670,000 twenty-foot equivalent units (TEUs) of cargo since July 18, 2013. (Xinhua/Li Jianan)

This aerial photo taken on July 18, 2023 shows a China-Europe freight train bound for Hamburg, Germany leaving Putian Station in Zhengzhou, capital of central China's Henan Province. Zhengzhou has handled 7,572 China-Europe freight trains which have carried 670,000 twenty-foot equivalent units (TEUs) of cargo since July 18, 2013. (Xinhua/Li Jianan)

This aerial photo taken on July 18, 2023 shows a China-Europe freight train bound for Hamburg, Germany waiting for departure at Putian Station in Zhengzhou, capital of central China's Henan Province. Zhengzhou has handled 7,572 China-Europe freight trains which have carried 670,000 twenty-foot equivalent units (TEUs) of cargo since July 18, 2013. (Xinhua/Li Jianan)

This aerial photo taken on July 18, 2023 shows a China-Europe freight train bound for Hamburg, Germany leaving Putian Station in Zhengzhou, capital of central China's Henan Province. Zhengzhou has handled 7,572 China-Europe freight trains which have carried 670,000 twenty-foot equivalent units (TEUs) of cargo since July 18, 2013. (Xinhua/Li Jianan)