Lam Kok, the 46-year-old head of the Hong Kong-based Brilliant group, had just bought Chateau de la Riviere, a major Bordeaux vineyard.
The accident happened at the end of a festive day marking Thursday's sale of one of the region's oldest wine estates reportedly worth 30m euros (£25m).
He and his 12-year-old son were on the helicopter piloted by James Gregoire, the former owner, when the accident happened on Friday. An interpreter was also a passenger.
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