Burberry, Alexander McQueen, Tom Ford and Jimmy Choo are some of the big names showing over the next four days alongside Savile Row tailors such as Richard James, Gieves & Hawkes and Hardy Amies.
The event opened with a show by Topman, the brother label of high-street brand Topshop, featuring retro tracksuits, wide-legged chinos and sporty tailoring and watched from the front row by Formula One world champion Lewis Hamilton.
Men's fashion week, officially known as "London Collections: Men", grew out of the larger womenswear event and is now in its seventh edition, with 77 designers on the main programme.
"We've been looking at the Asian market for quite some time because there's been huge interest in London Collections from Asia," said Dylan Jones, chairman of men's fashion week and editor of Britain's GQ magazine.
More From This Section
Attendance by Chinese press and buyers has grown 185 percent since the event began in 2012, he told AFP, adding that Hu would "take the message of British menswear all around the world, but particularly to China."
Italian luxury menswear brand Ermenegildo Zegna, which opened its first store in Beijing in 1991, says China is already its biggest market worldwide.
Chinese investment has also given established British brands a new lease of life -- Savile Row tailors Hardy Amies, Kilgour, Gieves & Hawkes and Kent & Curwen are all now owned by Hong Kong's billionaire Fung brothers.
Hu said he wanted to be "the bridge" between London and Asia -- a role which includes encouraging young Chinese designers who want to show in the British capital.
Only one Chinese designer, Beijing-based Xander Zhou, has been a regular fixure on the London menswear calendar.
In the past he has deliberately eschewed what he calls the traditional "dragons and peonies" for fear that he would be pigeon-holed -- but said this is about to change.