XINING, March 24 (Xinhua) -- Northwest China's Qinghai Province plans to build or upgrade 400 toilets at tourist sites in the next three years as part of nationwide efforts to spruce up public toilets, according to the provincial commission of tourism development.

The commission said that 346 new toilets will be built and 54 toilets will be renovated to meet the needs of tourists.

Earlier this month the provincial government announced that they will spend 3.2 billion yuan (about 500 million U.S. dollars) in building or upgrading more than 198,000 public toilets across the province in the next three years.

China's toilet "revolution" began in 2015 in an attempt to make the worst facilities cleaner and better regulated. More than 30,000 new toilets were built and close to 25,000 public facilities were renovated between 2015 and 2017.

Nationwide, around 64,000 toilets will be built or improved at tourist destinations by 2020.

Qinghai boasts a broad nature reserve including pastures, snow mountains and Gobi desert. Qinghai Lake, the largest inland saltwater lake in China, is a major tourist attraction. The province also has a number of Tibetan-inhabited areas, attracting tourists with their ethnic culture.

The province received more than 34 million tourists in 2017, up 21.1 percent.