Former Barcelona star Neymar has congratulated Paulinho on joining the Catalan side, telling his compatriot, "I hope you are as happy as I was."
Barcelona confirmed the signing of the 29-year-old from Guangzhou Evergrande for €40 million Monday.
The former Tottenham midfielder was the club's first signing since the world-record €222m sale of Neymar to Paris Saint-Germain earlier this month.
Taking to Instagram, Neymar told his Brazil team-mate: "Brother, all the fortunes of the world for you ... I hope you are as happy as I was."
Barca face Real Madrid in the second leg of the Spanish Super Cup on Wednesday, with Paulinho set to be unveiled Thursday.