The car is the composed of aluminum and steel , which provides elegant appearance and high intensity. It is cool in summer and warm in winter, due to the adoption of advanced thermal inulation technology . Day lighting is good because of the big window . The width of car-body could reach to 4.8-5.5m by its expanabe mechanism . A large-screen color television and KTV appliance with first class sound effect are equipped there . Apart from these , there are multi-functional desks and chairs , toilets , etc. The adoption of advanced sewage treatment system makes it easy for cleaning-up and environment -friendly. The series mobile office are suitable to the field which has certain pursuit for entertainment purpose .They can promote the quality of leisure life effectivlely .