According to the South China Morning Post, "the government's Mega Events Fund will pay HK$8 million to help cover the cost of United's sizeable appearance fee."
United have more than 100 million fans in the region, with the match taking place at Hong Kong Stadium.
The match is expected to be a 40,000 sell-out and Manchester United's chief executive David Gill said: "The Club has tremendous support throughout China and especially in Hong Kong.
"We have visited on a number of occasions and after an eight-year gap it's a pleasure for the team to be able to return to Hong Kong again this year.
"We are looking forward to engaging with our loyal fans, our commercial partners and most importantly preparing for the season ahead."