A charity concert is set to take place on Saturday at Kai Tak Sports Park, marking the main stadium's inaugural non-sporting event, with authorities saying it will serve as a test to simulate the logistics for future large-scale performances at the venue.

Authorities said approximately 18,000 spectators will attend, with about 4,000 gathering on the ground-level turf area.

Tang King-shing, the venue's director for strategic planning, said that assessing the turf's use will be one area of focus during their testing.

"The stage and the spectators will be sitting on protective layer using I-track, it's the name of the protective layer, so there won't be any question of damaging the turf itself. So that's why before we have been emphasising the fact that as far as the surface of the main stadium is concerned, it's a flexible arrangement," he said.

"We can use genuine turf for high-quality football or rugby events and use the layer underneath, the I-track, for concert events like the one coming this Saturday by simply removing the turf."

Commissioner for Sports George Tsoi said event organisers have chosen to close the roof for this concert to better test their acoustics and audio effects.

"We hope we can have the opportunity to test out all the different elements and the coordination amongst our different staff and as well as the arrival and dispersal of our audience," he said.

"We hope that we can have good experience and further improve our operations in future."

Tsoi said doors will open for concert goers at 4pm, with the performance scheduled to start at 6pm and wrap up before 8pm.

He added that attendees should have already gotten their tickets in advance and they should review the list of prohibited items prior to arriving.

Tsoi said more test events are to come, with each one increasing in scale and sophistication, highlighting another large test on January 24 with over 60,000 participants to prepare for the official opening of the Sports Park in March.

Principal Transport Officer/Urban of the Transport Department Eric Wan said the MTR will implement special service arrangements, including increased train frequencies, and KMB and Citybus will organise three bus routes serving East Kowloon, West Kowloon and Hong Kong Island during the dispersal period.