Of the three people injured, one is critical in the intensive care unit, Bai Zunguo, deputy head of Nanzhang County said.
The Mirage Hotel was devastated on Friday evening when around 3,000 cubic metres of debris slid down a slope behind the hotel.
The largest falling rock weighed 150 tonnes.
A total of 15 people, including hotel workers and guests, were trapped in the restaurant on the first floor.
Rescuers pulled five people from the debris, two of whom died in hospital, state-run Xinhua news agency reported.
Geological expert Nie Haitao said after field investigation that rainwater seeping down through rock fissures had affected stability, and caused a sudden collapse after frequent freezing and melting.
The hotel was built in 2007.
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