Also, the English name board next to the bridge clearly says LE DUAN. There are always difficulties translating from Cyrillic characters but, as Pieter says, we must go whith what is official.

But Lloyd's and other registers always says DUAN and not ZUAN. I can and must only follow the official registers.

Correct name is "Le Zuan". You can see forward, cyrillic "З" = "Z"