While the two clubs finalise details over a season-long loan deal for the Holland U21 international, Chong is scheduled to be part of Werder first team training on Sunday.
It's understood a compromise between the two clubs have been found over Chong's wages. It was originally demanded by United that Werder cover 100 per cent of his salary.
Werder midfielder Davy Klaasen said of his countryman: "He is a type of football player of whom we do not have many yet.
"He's a good dribbler who can pass a man. He could be a good reinforcement for us."