Every passenger room of the G-prefix high-speed rail is equipped with a squat pit. There will inevitably be internal emergencies that need to be solved immediately during the ride. Domestic high-speed trains are generally equipped with toilets, but some people are reluctant to use toilets. After all, public places are relatively hygienic. Therefore, considering the needs of passengers, the railway department has two toilets in each carriage, one for sitting and one for squatting. Toilets are generally located at the rear of each car, which is convenient for use.