The Chinese striker, 23, joined United from Dalian Shide for £500,000 in 2004 and went on loan at Royal Antwerp for two years, scoring 35 goals in 61 matches, as he awaited a work permit to play in England.

When Dong got clearance, he made his United debut against Chelsea in May 2007 and became the first Chinese player to feature for the Red Devils.

However, Dong made only two appearances last season as United clinched the Barclays Premier League title.

A statement on United's website confirmed: "Dong Fangzhuo's United contract has been cancelled by mutual consent."