According to media reports, Beijing has recently launched a pilot service of "rail+cycling", and some subway lines allow passengers to carry bicycles to take the subway. According to regulations, passengers can only carry two wheeled bicycles with pure manual drive and wheel diameter not exceeding 28 inches (about 71cm), and are not allowed to transfer to non pilot routes. They must enter and exit the station according to the selected station at the time of ticket purchase. In terms of ticketing, a single ticket price of 30 yuan per person is implemented, which includes the passenger's own and one bicycle's daily access rights, and there is no time limit. The connection between rail transit and cycling routes is undoubtedly good news for many enthusiasts. At present, many cities in China have built cycling greenways winding between suburban landscapes and urban attractions, providing citizens with a green lifestyle that integrates viewing, fitness, and leisure. However, 'how to get there' often becomes an invisible threshold. Many people can only choose to buy folding bicycles to take the subway, or simply put the bike rack on the roof of their private car, drive to the greenway, and then ride back and forth. Obviously, this not only affects people's cycling planning, but also reduces the "green content" of travel. The pilot launch of the Beijing subway allows regular sized bicycles to enter and board the station without folding, undoubtedly creating an "interface". However, controversy also followed. How can we accommodate another bicycle when the cabin space is already limited? Is the price reasonable for a 30 yuan ticket for both passengers and vehicles? Will there be any collision with other passengers during the process of getting on and off the bicycle? All kinds of disputes are related to the allocation of limited space resources in the carriage by various parties. People who are concerned about the carrying capacity of the carriage believe that adding one more car will add a little more congestion, directly affecting the riding experience; People who question the high ticket price of 30 yuan are comparing it to free luggage and even the size of strollers. In fact, every "redistribution" of subway space is prone to become a focus of social attention. Previously, adding armrests to car seats was also interpreted as "squeezing fewer people". In this context, allowing payment to carry unfolded bicycles inevitably leads to repeated scrutiny. However, upon closer inspection of the pilot rules, it is not difficult to discover many refined constraints. For example, bicycles allowed to enter the station have strict size requirements and must be fitted with black covers; After entering the gate, it is not allowed to push and can only be carried by hand or shoulder. In addition, the ability to carry bicycles is limited to certain designated stations and routes, and can only be done during weekends. These constraints precisely constitute the "regulating valve" of demand, which naturally filters out the actual volume of bicycles taking the subway. The demand for seamless connection between cycling and subway should be taken seriously and included in the consideration of urban public transportation. Making travel more convenient and providing more diverse choices reflects the inclusiveness and refinement of a city's public services. Therefore, it is advisable to seek answers from practice and gradually adjust different travel needs to a balance point. Of course, the setting of subway carriages is ultimately aimed at passenger transportation, not the freight demand for large items, and safety is always an indispensable prerequisite. The rail transit department may consider synchronously upgrading supporting services in the pilot, such as setting up fixed hooks in the carriages and designating dedicated parking areas, which may greatly alleviate the public's safety anxiety about bicycles on the subway. (Looking into the New Era)