Watford have an offer from Chinese club Changchun Yatai for Odion Ighalo.
The 27-year-old's agents have also spoken to Hebei Fortune in a bid to force a move away from Vicarage Road.
The Nigeria international is out of favour under Watford manager Walter Mazzarri and wants to leave.
Mazzarri, speaking ahead of Watford's defeat to Millwall on Sunday, said: 'With Odion Ighalo we know there are some offers, but it is still too early to say anything.
'I just heard now there is a very important (bid), but again we will evaluate in the next days.