The National Stadium - or Bird's Nest - was used at the 2008 Olympics.
"When you plan someone's career like Joshua you tend to plan in advance," said Hearn, who saw Joshua stop Charles Martin last month to win the title.
"I think we're two years from saying we can sell out the Bird's Nest in China."
Hearn is the father of Joshua's promoter Eddie, and chairman of the fighter's Matchroom stable.
He identified China's 2008 Olympic silver medallist Zhang Zhilei, who has built an unbeaten professional record of eight fights since basing himself in Las Vegas, as a potential opponent for 26-year-old undefeated Joshua.
"Sometimes these things don't happen because people get beaten, but our job is about creating these kinds of moments," he added.
Joshua will make the first defence of his title against American Dominic Breazeale in London next month.

20 October 2016 Last updated at 14:40 BST
In a short speech, Prof Hawking said: "The rise of powerful AI will be either the best, or the worst thing, ever to happen to humanity. We do not yet know which."
Read more: Stephen Hawking - will AI kill or save humankind?

Last week he faced the embarrassment of being heckled in parliament during a chaotic session when he had to wait about an hour before he could make his state of the union address - an occasion that has all the pomp and ceremony as that of the US Congress.
That came hot on the heels of the biggest political U-turn in democratic South Africa's political history when he agreed to pay back to the state some of the millions spent on upgrading his private home, Nkandla.
Yet it was a tactic that failed to pay dividends as the opposition went ahead with their case at the Constitutional Court in the hope that its ruling may open the way for impeachment proceedings against him.
And then there have been the other upsets in recent months.
The finance ministers fiasco when he had three within two days, sending the markets into freefall and sparking the Zuma Must Fall demonstrations, which were rooted in the student protests that rocked the country last year.
And he was roundly mocked and forced to issue an apology for declaring at a business meeting that Africa was the biggest continent - forgetting the huge land mass that is Asia.
But Mr Zuma has always been able to laugh off the many controversies he has faced, including - before his election in 2009 - fighting off allegations of rape and corruption in relation to an arms deal.
And he has always relied on the backing of the governing African National Congress (ANC) to survive his scrapes.
So despite his recent political battering, Mr Zuma - an avid chess player - is unlikely to throw in the towel himself.
But the ruling of the Constitutional Court, which could take several months, and the outcome of upcoming local elections may ultimately decide his fate.
The president can only be removed by the ANC. The party has a parliamentary majority and so his own MPs would have to vote for him to be fired.
The other scenario is that the party's national executive could demand he go - as they did to Thabo Mbeki in 2008. There is no provision in the constitution for a president to be removed from power by recall but Mr Mbeki was forced to resign.
For the moment that is unlikely as senior leaders in the former liberation movement are currently at loggerheads with trade unions.
"Zuma will continue to take advantage of these divisions. There's no one strong lobby group about who will succeed him," Judith February, political analyst at the Institute for Security Studies, told me.
But she said there is a chink in the 73-year-old president's armour.
"He is not weakened enough, unless the local government elections go hugely against the ANC, then they might want to revisit the idea of recalling him," Ms February said.
So the climb down over Nkandla may have robbed him of his moral authority - but it is not checkmate, yet.
Great Britain's IBF world heavyweight champion Anthony Joshua could make a defence of his title at Beijing's National Stadium, according to promoter Barry Hearn.
[NEXT_CONCEPT]
Prof Stephen Hawking has discussed the potential pitfalls of artificial intelligence, at an event in Cambridge marking the opening of the Centre for the Future of Intelligence.
[NEXT_CONCEPT]
South Africa's President Jacob Zuma is experiencing the dark night of the political soul.