All transfers in China are done by helicopter even in the relatively benign East China Sea. There are occasions where an emergency requirement will call for an inter field basket transfer. The only time they have a rig to shore by boat is if during a typhoon evacuation there are more people than the helicopters can cope with.
They will always go back to the rig by helicopter.
Once you get a bit of a gale and the heave builds up past two metres they will forget the whole thing. It's some beancounter trying to make a name for himself.