Their current deal with the company runs out at the end of the current campaign, and chief executive Keith Wyness has been in the Far East this week to complete the deal.

The previous deal was worth around £4.5million to Everton, and the new contract reflects Everton's involvement in European football and their growing improvement in the Barclays Premier League.

Wyness said: "We are delighted to be able to capitalise and build upon our existing relationship with Chang.

"The scale of this new deal reflects Everton's success on and off the field in recent years and also represents Chang's faith in the Everton name."