Morgan revealed in his column for the Daily Mail that Rooney had contacted him to speak about his upcoming testimonial match for the Red Devils, but also talk the opportunity to confide in Morgan about the big money offer from the cashed-up Chinese club.
"My phone rang at 11pm tonight. It was England football captain Wayne Rooney," Morgan wrote.
"He wanted to discuss his forthcoming Manchester United testimonial plans this summer.
"But we also talked about reports in the papers this week that he's been offered ridiculous sums of money to go and play in China for Shanghai, a team managed by Sven-Goran Eriksson.
"'It's true,' he said. 'How big a salary are we talking?' Rooney chuckled. 'Come on,' I prodded, 'make me sick.'
"He then revealed a figure, based on a three-year deal, so stupendously, stratospherically gigantic that it did indeed make me feel instantly nauseous.
"(Without giving too much away, let's just say it included eight noughts) I literally gasped in horror, prompting him to add a final killer blow: 'After tax!'
"'There's another advantage I can see,' I said. 'What's that?' 'The Chinese fans won't realise how slow you've got.' '**** off!'
"My guess is Rooney won't leave United for another year or two.
"But one thing's for sure, the Chinese are coming for world football and as with everything they do in business, they seem to have almost limitless sums of cash with which to dominate it."