Heavy rains brought by the remnants of Typhoon Megi caused the landslide to crash into Sucun village on Wednesday.
The microblog of official provincial news portal Zhejiang Online showed pictures of survivors being carried out on the backs of rescuers, while others dug through rubble to locate survivors.
It gave no details of those still missing other than to say one was an official who had been in the village to organize evacuations.
A mass of debris rolled down a lush mountain toward the small village, according to images posted on Zhejiang Online.
Mountainous Zhejiang, along with its neighboring provinces, are frequently hit by typhoons at this time of year and are also highly susceptible to landslides.
Megi had already killed four people and injured more than 523 in Taiwan since it had roared in from the Pacific Ocean. (Courtesy Reuters)