CHANGSHA - A Chinese company unveiled a series of sanitation robots Tuesday in the city of Changsha, capital of Central China's Hunan province.

The sanitation robots, developed by Zoomlion Environment Industry Co., Ltd., can relieve the city's sanitation manpower shortage and rising costs, according to the company.

The robot family includes an electric cleaning robot, an electric washing robot and five other models, the company said.

The robots can be deployed in alleys, schools, industrial parks and other urban areas. The robots have specialties including snow removal and some that are able to climb and clean walls, according to the company.

All seven sanitation robot models can switch between unmanned and manned mode, and can also be equipped with a 5G communication module, said Zhang Bin, innovation director of the company.