Southwest China's Guizhou province plans to build or upgrade more than 2,400 toilets at tourist sites over the next three years as part of nationwide efforts to improve public toilet facilities, according to the provincial tourism development commission.

The commission said that 2,076 new toilets will be built and 407 toilets will be renovated to better meet the needs of tourists.

The facilities will be located in scenic areas, airports, train stations, and restaurants, the commission said.

Guizhou has invested 1.243 billion yuan ($198 million) in building and upgrading 3,200 public toilets since 2015.

China's "toilet revolution" began in 2015 in an attempt to improve the cleanliness and management of the worst facilities across the country. More than 30,000 new toilets were built and close to 25,000 were renovated between 2015 and 2017.

The country plans to install or upgrade 64,000 toilets at tourist sites nationwide from 2018 to 2020, to create convenience for travelers and develop domestic tourism.