[ Introduction ]
It is transportation that is the direct product of the social link and social relationship of the people. Revolutionary changes have taken place in the life of the mankind since human beings acquired the capability of walking upright as a result of evolution from the ape. Human being's vision was widened to enable itself to better observe the surroundings and to be watchful against any possible crises. But due to the low productive forces and constraints on people by the conditions of the nature in the primitive times, usually they could not but live by hunting animals or gathering plants within a certain region to maintain the lease of life by making use of a few elements of the nature, let alone any act of transport for the commercial intercourse among the peasants, workers and merchants.

Nevertheless, with the development of human society, people gradually widened their vision in the geographic space through several forms of lateral social contact in their production activities and injected active seeking factor into the passive man, environment relationship.

Gradually, human being mastered the use of tools and other special at his service. Among others, the horse, an animal which changed the speed of human transportation, enabled a cart to run at some 10km/h, thus the region scoped varied and the link between city and city became closer, enhancing the progress of culture and civilization in various places.

The British Industrial Revolution shook the transportation modes left over in thousands of years. The advent of automotive and train realized the revolution of power and the engine enabled vehicles to substantially increase their speed. From then on, speed was associated with energy and efficiency. Nowadays, a car usually runs at 80 to 100km/h. Train has evolved from a very slow, heavy iron "thing" into a sort of popular surface transportation means, which can attain a speed of 150 to 200km/h.

Speed is a target the mankind is eternally seeking.

At present, high speed rail is in common use in Europe as well as in Japan. Its max speed exceeds 200km/h,thus pulling cities, even countries still closer and vigorously promoting information exchanges and talent folw.

One of the characteristics of the society created by modern science and technology is the large volume of information and the wide high speed transmission of information. A wholly new concept of region and speed has been formed in the minds of people and it has become a global culture, which is more and more unchangeable.

With such an aspiration of the mankind's for high speed transportation, maglev technology was born at the right moment. In the labs of many countries, scientists and engineers were striving to put the product which integrated traditional electromechanical components with modern control technology into commercial application.

[ Maglev Technology ]
Electromagnetic levitation: controllable electromagnetic field is generated by exciting the on-board levitation magnets and the magnets and stator packs of long stator linear motor along the guideway attract each other, thus pulling the train upward and a stable levitation gap being guaranteed by controlling the levitation excitation current. Levitation gap between magnets and guideway is normally controlled to the range between 8 and 12mm.
High-speed maglev system consists of four major components, i.e. guideway, vehicle, power supply and operation control system.

Guideway: the guideway guides the direction of the train's movement and bears the load of the train and transmits it to the sub grade. The superstructure of the guideway comprises precisely welded steel or reinforced concrete guideway beams for connecting long stators and substructure constituted by the reinforced concrete piers and foundations.

Vehicle: vehicle is the most important part of the high speed maglev system, comprising levitation chassis and the magnets mounted on the chassis, secondary suspension system and vehicle section. Besids it includes such electrical appliances as on-board batteries, emergency braking system, levitation control system.

Power supply: The power supply system includes substations, trackside feeder cables, switch stations and other power supply equipment. Power supply system feeds the train with the power required for the train operation by energizing the long stator windings on the guideway. First, high voltage alternating current is taken from the 110KV public power grid, stepped down to 20KV and 1.5KV via step-down transformer, then converted into direct current via rectifier, then converted back to variable frequency a c current between 0 and 300Hz via rectifier. After step-up, the current will be fed to longstator winding on the guideway via guideway cables and switch stations, generating propulsion force between the stator and on-board magnets. The rectification equipment, conversion equipment and motor stators etc. of the maglev system are all installed on the ground. No strict requirements for the volume, weight, and anti-vibration of the equipment are available.

Operation control system: It is the fundamental guarantee for the normal operation of the entire maglev system. It includes all the equipment to be used in security guarantee control, execution and plan and also includes the equipment to be used in communication among the equipment. Operation control system consists of operation control center, communication system, decentralized control system and on-board control system.