HONG KONG (AP) _ Twenty passengers and crew remained hospitalized a day after a China Southern Airlines jet hit turbulence and plunged 2,000 feet, hospital officials said today.

A 49-year-old man from Taiwan remained in serious condition with a fractured spine, said Linus Fu, a spokesman for Princess Margaret Hospital. His name was not disclosed.

Others were in stable and satisfactory condition with head and neck injuries, Fu said.

Flight CZ341, carrying 160 passengers from the southern Chinese city of Kunming, hit severe turbulence and dropped from 21,000 feet to 19,000 feet in five to 10 seconds. The impact hurled many passengers from their seats and toward the cabin ceiling.

The Boeing 757 jet landed at Hong Kong's Chek Lap Kok airport safely about 15 minutes later.

Officials from the airline, based in the southern city of Guangzhou in China, are investigating.