Photo taken on Dec. 21, 2015 shows the landslide site of an industrial park in Shenzhen, south China's Guangdong Province. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Rescuers work at the landslide site of an industrial park in Shenzhen, south China's Guangdong Province, Dec. 21, 2015. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Photo taken on Dec. 21, 2015 shows the landslide site of an industrial park in Shenzhen, south China's Guangdong Province. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Photo taken on Dec. 21, 2015 shows the landslide site of an industrial park in Shenzhen, south China's Guangdong Province. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Rescuers work at the landslide site of an industrial park in Shenzhen, south China's Guangdong Province, Dec. 21, 2015. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Rescuers work at the landslide site of an industrial park in Shenzhen, south China's Guangdong Province, Dec. 21, 2015. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Rescuers work at the landslide site of an industrial park in Shenzhen, south China's Guangdong Province, Dec. 21, 2015. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Rescuers work at the landslide site of an industrial park in Shenzhen, south China's Guangdong Province, Dec. 21, 2015. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)

Photo taken on Dec. 21, 2015 shows the landslide site of an industrial park in Shenzhen, south China's Guangdong Province. A total of 91 people remain missing as of early Monday morning, after a landslide buried or damaged 33 buildings in the industrial park in Shenzhen City on Sunday, according to local authorities. (Xinhua/Zheng Lei)