The Hard seat (Chinese: 硬座; pinyin: yìng zuò), abbreviated YZ, is the cheapest class of seating in China Railway. It is available on non-high-speed trains. Hard seat derives its name from the hard, wooden seats in the Mao era on regular passenger trains. Modern "hard seats", however, are upholstered. Each carriage provides the most basic services common to all Chinese trains, namely toilets, wash basins and a boiling water dispenser.