“From China, they’ve offered 300m euros to Real Madrid and more than 100m per year to the player,” Mendes said.
“But money is not everything. Real Madrid is his life. Cristiano is happy at Real Madrid and it is impossible to go to China.”
The transfer offer, if genuine, would be almost triple the world record 105million euros (£89.6million) Manchester United paid Juventus for Paul Pogba in August.
Ronaldo, World Player of the Year for World Soccer magazine and voted BAllon d’Or winner for a fourth time by France Football, signed a new contract at Madrid in November, extending his commitment to the club until 2021.
But the cash-rich Chinese Super League has emerged as a major contender in the world transfer market with mega-money deals.
Last week, SPG Shanghai signed Brazil midfielders Oscar from Chelsea for £52m, while on Thursday former Manchester City striker Carlos Tevez left Boca Juniors for Shanghai Greenland Shenhua where he will reportedly become the highest paid player in the world on the equivalent of £615,000 a week.
“The Chinese market is a new market,” Mendes added. “They can buy a lot of players, but then again it is impossible to go for Ronaldo. Cristiano is the best player in the world and best ever. It is normal to have some offers.
“He won the European Championship with Portugal, it’s like winning the Italian league with Genoa: they were not the favourite.”