Not enough is being done to prepare for the expected surge in Chinese tourists over the next year, according to the State tourism industry's peak body.
Tourism Council chief executive Evan Hall predicted visitor numbers from China would double in the next 12 months, particularly with China Southern Airlines expected to start direct flights to Perth by November.
But Mr Hall said WA may not be ready.
"We don't yet have enough hotel rooms, Mandarin-speaking staff or translator guides to service this booming market," he said.
"If they don't have a good experience, they will stop coming.
"We need a whole-of-government approach to get WA tourism China ready."
Mr Hall's comments came after the release of figures showing a 2.6 per cent increase in the number of international tourists to WA in the year to the end of March.
The biggest growth area was from China, with a 36 per cent increase taking the total number of visitors to 15,200, followed by Indonesia (up 27.5 per cent to 28,900) and the US (up 19.9 per cent to 45,400).
The data also revealed a significant increase in the amount being spent by international tourists - up 9.5 per cent to $1.9 million, the second biggest increase in Australia. There was also a 4.5 per cent rise in the number of nights stayed.
Mr Hall said most of the initial surge in Chinese tourists would be through package holidays, where he expected translation services to be well organised.
But he said improved translation and interpreter services would be needed as more individuals and family groups came to WA and travelled around by themselves.
"This means we need restaurant menus translated, hotel fire-drill manuals translated and appropriate signage at popular tourist destinations like Rottnest Island," Mr Hall said.
"We cannot afford to get it wrong."The State Government has set aside $5.2 million over the next four years to help the tourism industry make the most of the influx of Chinese visitors.
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