The death toll from a large landslide that struck a town in southwestern Guizhou province on Monday rose to 23 while a second landslide on Wednesday killed seven people in the northwest of the country.
More than 600,000 cubic metres of rock and mud had fallen in the town of Zhangjiawan in Guizhou, and rescue efforts were continuing to find 12 people still missing, the official Xinhua news agency said.
Separately, seven people were killed and two injured in a landslide that struck a village in Machin county of northwest Qinghai province, Xinhua reported.
China has seen heavy rainstorms across the country over the past week.
Landslides are a frequent danger in rural and mountainous parts of China, particularly after heavy rain.
In June and August massive landslides in the southwestern province of Sichuan killed more than 30 and left scores missing.
In July 63 people were killed by landslides and floods in the central province of Hunan. Some 1.6 million people were forced from their homes.
Last week powerful Typhoon Hato killed 18 people as it tore across southern China, including Hong Kong and Macau.
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