( CNN ) -- A Chinese investor who had just bought a French vineyard is feared dead in a helicopter crash that killed his son and is thought also to have claimed the lives of an aide and the vineyard 's previous owner . Lam Kok had completed the purchase of Chateau de La Riviere in the Aquitaine region of southwest France on Thursday , the vineyard 's marketing manager , Thierry Disclyn , told CNN . On Friday , Kok introduced himself to all the employees , and at about 5 p.m. local time decided to tour the estate by helicopter , Disclyn said . The helicopter , which was also carrying the vineyard 's previous owner , James Gregoire , Kok 's 11-year-old son Charles , and a representative of Lam Kok , Peng Wang , crashed into the Dordogne River . Police have recovered the body of Charles Kok but are still searching for the other bodies , Disclyn said . According to the local Sud Ouest newspaper , about 30 police officers and a team of divers are engaged in the search , which resumed at 8 a.m. local time . Lam Kok is the head of the Brilliant group , which specializes in the luxury hotel market , Sud Ouest said . Kok wanted to turn the spectacular chateau building into a high-end resort and spa catering to wine enthusiasts , the newspaper said . The 60-hectare Chateau de La Riviere estate , in Fronsac , east of Bordeaux , had belonged to James Gregoire since 2003 . It was the largest of three vineyards owned by the Gregoire family in the region .
Chinese investor Henry Wang is found dead in a helicopter crash in southwest China . His son 's body has been recovered , but police continue to search for Wang and two others . The vineyard 's previous owner , who 'd sold the estate to Kok on Thursday , was also aboard . Kok wanted to tour the vineyard by helicopter , its marketing manager says .