The Chinese-made towboat in South America apparently is a new made-and-delivered boat.
Here is the information from this Flickr photo.
P&O MBURUCUYA (7 May 2012) P&O CEIBO
(Sept.2012) built by Yuexin Ocean Engineering
Co (has a website in english) 45 x 16 x 1.83
m. Warsila diesel engines (3 x 1600kW) 6534
HP own: P&O Maritime Holdings Paraguaya
I don't understand all of that, and the design may look old to some experienced river hands' eyes, but according to this information, it is indeed new.