Brazil will take on world number two and European champions Spain, also at 3-1 after today's loss to the excellent Russia, on Monday in a head-to-head battle for second place in the group.
Their latest result was never really in doubt as Brazil overpowered the Chinese.
When Leandro Barbosa hit a three-pointer with two-and-a-half minutes left in the first quarter, the lead was already 17-4, and China showed little sign they could do anything about it.
Brazil were leading 25-9 by the end of the first quarter and 42-21 by half-time.
Coach Ruben Magnano dropped his starting five to the bench for most of the second half but still China could not make an impact as Brazil's lead only grew, and it took a jump-shot from Ailun Guo two seconds time to prevent a 40-point margin in the game.
Marquinhos Sousa had 14 points to lead Brazil while Barbosa and Guilherme Giovannoni added 13 each and Tiago Splitter 12.
Zhu Fangyu led China with 13 points on an off-night for Dallas Mavericks star Yi Jianlian, who managed only five points on one-of-nine shooting from the field.