Rescuers work on the boats on the Dordogne River at the site of a helicopter crash in Lugon-et-l'e-du-Carnay, France, Dec. 20, 2013. Rescue teams scoured the Dordogne river in southwestern France after a helicopter carrying three Chinese went down on Friday. (Xinhua/Fabien Cottereau) 
 

Rescuers work on the boats on the Dordogne River at the site of a helicopter crash in Lugon-et-l'e-du-Carnay, France, Dec. 20, 2013. Rescue teams scoured the Dordogne river in southwestern France after a helicopter carrying three Chinese went down on Friday. (Xinhua/Fabien Cottereau)

Official of Chinese Embassy in France Li Ping (3rd, L) inspects the site of a helicopter crash in Lugon-et-l'e-du-Carnay, France, Dec. 21, 2013.Rescue teams scoured the Dordogne river in southwestern France after a helicopter carrying three Chinese went down on Friday. (Xinhua/Fabien Cottereau)

Rescuers work on the boats on the Dordogne River at the site of a helicopter crash in Lugon-et-l'e-du-Carnay, France, Dec. 20, 2013.Rescue teams scoured the Dordogne river in southwestern France after a helicopter carrying three Chinese went down on Friday. (Xinhua/Fabien Cottereau)

Rescuers work on the boats on the Dordogne River at the site of a helicopter crash in Lugon-et-l'e-du-Carnay, France, Dec. 20, 2013. Rescue teams scoured the Dordogne river in southwestern France after a helicopter carrying three Chinese went down on Friday. (Xinhua/Fabien Cottereau)