The Nigeria international has scored just once in the Premier League this season and departs Vicarage Road for the Far East
Watford have confirmed the departure of striker Odion Ighalo to Chinese outfit, Changchun Yatai, for a fee of around £20 million.
The Nigeria international impressed for the Hornets last season, but has fallen down the pecking order under Walter Mazzarri.
Having joined the Vicarage Road outfit from Granada in 2014, he scored 20 goals as Watford won promotion back to the Premier League in 2014-15.
And he continued his fine form into the top-flight, finding the net on 17 occasions as Quique Sanchez Flores’s side comfortably avoided relegation.
Under Mazzarri, however, he has failed to fire, with his 18 Premier League appearances bringing about just the single goal.
He joins Changchun ahead of the new Chinese Super League season as they look to improve on their 12th-placed finish last term.