On July 25, Nanjing Metro responded to the hot online discussion that "women were given a 'ticket' for drinking water in subway cars", saying that the passengers involved drank bottled fruit juice drinks. At that time, they issued a notice to publicize the prohibited items. According to Nanjing Metro staff, food and drink are prohibited in Nanjing Metro, but if you need to take medicine or other emergencies due to physical discomfort, you can drink water or ask staff for help. Previously, the issue of whether water can be consumed in subway carriages has sparked heated debate on the internet. Many people question that drinking water is not allowed in the subway, and the subway company's management is "too lenient". Now, according to the response of Nanjing Metro, the purpose of preventing the behavior of the passengers involved is to prevent the potential hazards of environmental health caused by spilled drinks. It is also listed in the List of No Administrative Penalties for Minor Violations of Nanjing Metro. If the food and drink in the train compartment does not affect the environmental health of the compartment, it will not be punished if it is timely rectified after being dissuaded. Nanjing Metro prevented passengers from drinking drinks, but did not impose substantive punishment, in line with relevant regulations. Drinking water and beverages, the former is necessary for maintaining normal physiological functions of the human body, while the latter is usually considered an unnecessary dietary activity, and there is a clear difference in nature between the two. During the operation of the subway, the carriages are prone to shaking, and during peak hours, people are more crowded. If you drink beverages in the subway, it is indeed possible for the drinks to spill out and contaminate the carriages, affecting other passengers. Not only Nanjing Metro, most of the cities with subways in operation in China have provisions on passengers' eating and drinking. However, many cities deal with such violations mainly by reminding and will not impose fines immediately. According to the 2022 Chinese Dietary Guidelines for Residents, adult males need to drink 1700 milliliters of water per day, while adult females need to drink 1500 milliliters per day. It is also important to pay attention to "small amounts and multiple times", such as "drinking one glass of water in the morning and one glass of water in the evening, and drinking one glass of water every 1-2 hours at other times. With the increase of subway mileage in domestic cities, the total time for passengers to take the subway is likely to exceed one hour if there are many stations, plus the transfer waiting. Not drinking water for a long period of time is unbearable for most people, and there are health risks for passengers with special physical conditions and illnesses. Rules always need to be constantly adjusted and revised in practice. This discussion sparked by the issue of whether water can be consumed in the subway, which also inspired subway management to differentiate between drinking water and beverages, distinguishing between necessary and non essential behaviors, rather than simply stipulating "no eating". Even if it is difficult to modify the written rules in a short time, the subway management party can take a flexible attitude in the actual management process. For example, it also stipulates that "passengers are prohibited from eating". Hangzhou Metro said that if passengers only drink a mouthful of water and eat a piece of sugar, generally no staff will stop them. In fact, reading the regulations of some cities regarding passengers taking the subway, it can be found that the common uncivilized phenomena listed in the subway still need to be further addressed. For example, behaviors such as "distributing advertising materials", "one person occupying multiple seats at the same time", and "using electronic devices to emit sound" have still occurred in subway carriages in some cities. This also reminds the relevant departments