Serbian President Aleksandar Vucic (2nd R), Hungarian Minister of Foreign Affairs and Trade Peter Szijjarto (1st R) and Chinese Ambassador to Serbia Chen Bo (2nd L) attend a ceremony marking the start of construction work on a new section of the Belgrade-Budapest railway in Serbia in Novi Sad, Serbia, Nov. 22, 2021. Construction began on a new section of the Belgrade-Budapest railway in Serbia at a ceremony on Monday. (Photo by Wang Wei/Xinhua)

Serbian President Aleksandar Vucic (2nd R), Hungarian Minister of Foreign Affairs and Trade Peter Szijjarto (1st R) and Chinese Ambassador to Serbia Chen Bo (2nd L) attend a ceremony marking the start of construction work on a new section of the Belgrade-Budapest railway in Serbia in Novi Sad, Serbia, Nov. 22, 2021. Construction began on a new section of the Belgrade-Budapest railway in Serbia at a ceremony on Monday. (Photo by Wang Wei/Xinhua)

Serbian President Aleksandar Vucic (front) speaks at a ceremony marking the start of construction work on a new section of the Belgrade-Budapest railway in Serbia in Novi Sad, Serbia, Nov. 22, 2021. Construction began on a new section of the Belgrade-Budapest railway in Serbia at a ceremony on Monday. (Photo by Wang Wei/Xinhua)