Representatives from the Chinese Super League are understood to have made the offer after visiting Manchester last month for the annual Soccerex convention.
The Manchester United midfielder, however, is said to have “politely” declined the incredible cash on offer and is determined to see his future at Old Trafford.
Mata has less than 12 months remaining on his deal and his camp expect the Red Devils to take up their option of extending that by a further year, to prevent him being able to leave on a free transfer next summer.
The Spain international is represented by his father, Juan Snr, who has been pushing the Red Devils since the end of last season to come to the table and discuss a longer term deal.
Mata joined United from Chelsea for a then club-record £37.1m back in 2014 and has since put down firmer roots in Manchester, opening a tapas and wine bar in the city-centre last year.
The former Valencia man earns a reported £170,000 per week and the 29-year-old is looking for similar terms, with United officials insisting boss Jose Mourinho has every intention of retaining the player.
Manchester City could complete the signing of Jorginho in the next few days after progress was made, Napoli officials have confirmed.
Roma goalkeeper Alisson has hinted he is open to a move to Liverpool and wants his future sorting as soon as possible.
Everton are ready to sell Morgan Schneiderlin to Southampton in order to make way for new signings, reports have claimed.
Chelsea have been told to forget about making a move for Robert Lewandowski as the Bayern Munich ace is going nowhere.
Arsenal are among the clubs showing an interest in Marseille midfielder Morgan Sanson, after his agent confirmed the link.
Bayern Munich president Uli Hoeness has blasted reports Robert Lewandowski's valuation has been set and insists he is going nowhere.
AS Roma goalkeeper Alisson says he would like his future resolving before the World Cup begins and admits he could leave the club.