A Chinese health company has rewarded 3000 of its best sales staff with a trip to Sydney, boosting NSW's Chinese tourist numbers already at record levels.

Since Saturday, BridgeClimb has been working on ''super capacity mode'' to fulfil its biggest ever single corporate booking, dispatching groups of 40 every 15 minutes over the arch.

Perfectly exclusive: The Sydney Harbour Bridge has been booked out for four days by The Perfect China company. Credit:Dean Sewell

The Perfect China company arranged exclusive use of the bridge for four days to reward its highest-performing employees. Perfect China's Sydney convention is the latest in a series of large-scale Chinese corporate incentive events secured by Business Events Sydney, partnered with Destinations NSW. The one booking alone is expected to inject $21 million into the state's economy.

The number of Chinese visitors attending conferences or conventions jumped by 70 per cent to 16,120 within the past four years, Tourism Research Australia said. Overall Chinese business traveller numbers rose 5 per cent each year in the same period.