Three police officers from the East Midlands Special Operations Unit have travelled to China on the hunt for Anxiang Du.
Du went missing after the Ding family were found killed in their home in Wootton, Northampton in April 2011.
They’ll be conducting enquiries to assist them in the murder investigation of the Ding family.
Officers say they have remained in close contact with the Chinese authorities but it is expected this personal visit will allow officers to speak with associates of Mr Du for further information.
Officers are also expected to meet the family of the victims face to face in to update them on the investigation.
– Detective Chief Inspector, Tom Davies, who is leading the investigation.
"From the beginning of this investigation we have remained in close contact with the Chinese authorities. This visit will assist us in a number of aims, including raising the awareness of the investigation in China and our hunt for Mr Du.
The family of the victims - Jifeng Ding, Helen Chui, Xing (18) and Alice (12) Ding- have received ongoing contact by family liaison officers, however meeting them in person will allow us to provide them with a thorough update on the investigation so far."
Police say they are keeping an open mind as to where Du may be, whether that is in China or elsewhere.