The last trip i been to Dongguan and was brought there by my friend a taiwan business man and paid like $800 RMB to bring the girl out of the KTV. That seems pretty resonable for this kind of price.
The last time i stay at this 5 star hotel there was at Dongguan Lung Chuen International Hotel ... cost like $80 SGD only.
I dont know the place well maybe its of a different place in Dongguan tho.
Just for reference... Hit me up if anyone going from SG during dec ... would be glad to return for more !!!