National highway:

　　National highway refers to the main trunk highways with national political and economic significance, including important international highways, national defense highways, highways connecting the capital with the capitals of provinces, autonomous regions and municipalities directly under the Central Government, and highways connecting major economic centers, port hubs, commodity production bases and strategic locations. The inter-provincial highways in national highways are built, maintained and managed by specialized agencies approved by the Ministry of Communications.

　　Provincial highway:

　　Provincial highway is also called provincial trunk highway. In the provincial highway network, it has provincial political, economic and national defense significance, and has been determined as a provincial trunk highway by the unified planning of provinces, municipalities and autonomous regions. Provincial highways shall be built, maintained and managed by the provincial (autonomous regions and municipalities directly under the Central Government) highway departments. The inter-provincial highways in national highways are built, maintained and managed by specialized agencies approved by the Ministry of Communications.

　　County road:

　　County road refers to the political and economic significance of the county (county-level city), connecting the county with the main townships (towns) and other major places in the county.

　　Zhihu netizen replied:

　　National highways and provincial highways are the division of highway functions, and national highways refer to national trunk highways and provincial trunk highways. The expressway refers to the road grade, which corresponds to the first-class highway and the second-class highway. So there is no necessary connection between them, even if they are two different objects, let alone the difference.

　　National highways are named with three digits beginning with G, such as G107 and G312, which are National Highway 107 and National Highway 312.

　　The first of these two national highways is along the Beijing-Hong Kong-Macao Expressway, and the second is along the Lianhuo Expressway. The label of Beijing-Hong Kong-Macao Expressway is G4, and that of Lianhuo Expressway is G30. Due to the nonstandard naming of provincial highways, it is generally impossible to distinguish provincial highways from provincial highways. However, according to the standard, provincial highways and national highways should have three digits, but some areas still have two digits, which may conflict with some provincial highways. Generally speaking, the three-digit numbers, G and S, begin with general highways, which are national highways and provincial highways. The rest of the numbers starting with G and S, one, two and four digits, are highway labels.

　　Although it can’t be absolutely judged from the name, it is not a problem during driving. On road signs, everything with a green background is an expressway, everything with a red background is a national road, and everything with a yellow background is a provincial road, and there are black characters on a white background, which is a county road.

　　The green background is expressway and the yellow background is provincial highway:

　　The yellow background is provincial highway and the red background is national highway:

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　　CCTV News:In order to create a good off-campus training consumption environment and effectively safeguard the legitimate rights and interests of students and parents. Recently, the Ministry of Education and the China Consumers Association issued the Notice on the Special Action of "Safe Consumption" for Off-campus Training, which will be held in May & mdash; In June, a special campaign of "Safe Consumption" for off-campus training was launched nationwide, and an off-campus training consumption environment was created in an all-round way to reassure the people.

　　The special action adheres to the people-centered development thought, with the main goal of protecting the safety of off-campus training payment and training places, and further promotes the governance of off-campus training by standardizing off-campus training behavior, publicizing scientific consumption concepts, strengthening consumer education guidance, and severely punishing all kinds of violations.

　　The special action focuses on six key tasks: first, standardize the behavior of training fees and adhere to the public welfare nature of off-campus training; The second is to strengthen the supervision of pre-paid funds for off-campus training, comprehensively prevent problems such as "difficulty in refunding fees" and "running away with money" to protect the safety of students and parents; The third is to speed up the resolution of off-campus training consumption disputes and effectively solve the reasonable refund demands of students and parents; The fourth is to strengthen the safety investigation of off-campus training institutions and create a healthy and safe consumption environment; Fifth, strengthen the guidance of consumer education and raise the awareness of consumer protection of students and parents as a whole; Sixth, resolutely investigate and deal with all kinds of illegal training behaviors, and effectively prevent and control the invisible variation training of disciplines without qualifications, quality assurance and safety guarantee.

　　The special action requires that all localities should strengthen organizational leadership, effectively improve their political positions, and take the special action of "safe consumption" for off-campus training as a major event to solve the people’s urgent difficulties and worries, and earnestly safeguard the legitimate rights and interests of students and parents. It is necessary to formulate a work plan, refine the work deployment, compact the responsibility, and establish a self-inspection and spot check mechanism to ensure the solid and effective promotion of special actions. All localities should be seriously accountable and informed of typical cases where responsibilities are not implemented, measures are not in place, and people have a strong reaction.