The former Corinthians and Tottenham man reunited with the squad for the first time since World Cup 2014 after coach Tite handed him a recall.
On Thursday, Paulinho enjoyed his first training session as a Brazil international since World Cup 2014.
He joined gold medalists Neymar and Renato Augusto at the Corinthians training complex in Sao Paulo.
A number of Corinthians youth team players joined the session to make up the numbers.