The global luxury business is set to suffer from dwindling numbers of Chinese buyers, the world's biggest consumers of luxury goods, due to a lockdown within and on the country to prevent a coronavirus from spreading further.

Here are some facts about the importance of Chinese buyers for the world's companies making stylish and expensive things.

The luxury engine 

Chinese consumers account for between 33% and 35% of all luxury goods bought in the world in value terms. 

The Bain & Company consultancy predicts that share will grow to 45% within five years, with half of their purchases made in mainland China. 

Much of the Chinese money is spent at home or the rest of Asia where major players in the sector, such as LVMH, Richemont, Kering and Hermes, generate around a third, sometimes more, of their overall sales, not counting Japan. 

China is also the world's main supplier to the tourism sector, clocking up nearly 150 million foreign trips in 2018, three times more than a decade earlier. 

Chinese tourists are also the world's top per capita spenders per trip.

How they spend it 

High-end fashion rakes in the biggest share of Chinese duty-free spending with 43.7% of the total, followed by department store shopping. 

In Paris and its surroundings, Chinese shoppers' favourite European destination, they spend 40% of their budget on lodging, 26% on shopping and 20% on food. 

Chinese trippers spent €265 billion on durable luxury goods such as handbags, clothes, perfumes and souvenirs, in the Paris region in 2018. 

The luxury retailer Galeries Lafayette's flagship store in Paris has now cut part of its welcome staff to take account of dwindling number of Chinese shopper numbers, two sources close to the company told AFP.

How bad is it? 
 
Luxury goods giants have not so far offered any estimates for the likely impact of the coronavirus epidemic on their businesses in Europe and Asia. 

During the six-week Chinese New Year period, Chinese shoppers spend 10% of their annual budget, says Denis Leroy, head of France at duty-free specialist Planet, which translates into €800m for Europe alone.

Rating agency Standard and Poor's said travel restrictions in China will "inevitably" weigh on Chinese spending and consumer confidence. 

It was too early to gauge the exact impact on global businesses, said S&P, but it was already clear that luxury companies would be among the most-affected. 

Profit margins at many luxury companies may still be big enough enough to absorb a drop in sales in the short term, but if the virus spreads more, so will the pain felt by the world's luxury giants. 

Analysts at Swiss bank UBS cautioned against drawing hasty comparisons with the SARS crisis in 2002 and 2003. 

At the time, they said, Chinese shoppers accounted for less than 10% of luxury sales compared to a third of the total today.