【正文】 graphy, geology, landform, water sources, energy source, climate, sunshine and so on。 Investigate all kinds of infrastructure, road traffic, and the construction conditions specified in the city planning. IV． Expectant Benefit. List the expected benefit after project implementation, and consider the minimum limit of the standard of the success. V． Overall Goal. Give the order of priority in time, cost, quality and other aspects, according to the aforesaid conditions. The decisionmaking should be first targeted towards the problems arising in the city. For example, the decision making for the development of Xidan Cultural Plaza is the product of such a process. Beijing has given consideration to the overall space structure in its urban planning, but its actual urban space structure is far from being perfect yet. The open space of Beijing has bee very scarce, and there is still a lot of space that is either unable to play its role or being constantly destroyed. There are two valuable lots of open space in Chang39。an Street: one is the Dongdan Sports Ground, and the other is the Illuminated Court opposite to Beijing Hotel. But new buildings have been added there locally or pletely, which has damaged the open space. Another example is that, the forecourts of the Palace of Culture of Nationalities and other places are enclosed in the courtyard wall, unable to play their practical role. Thus， new squares have not been opened up, but the original structure is being constantly encroached, further aggravating the lack of urban space structure of Beijing City. To solve such a problem, Beijing municipality proposed the idea of opening up 19 squares in the reconstruction within the inner ring roads, and Xidan Culture Plaza is just a product of such an idea. Xidan Culture Plaza has a constructed area of hectares, being the only precious green land in the busy urban district around Chang39。an Street, which has played a very important role for the adjustment and improvement of the space structure of inner Beijing. However, in China， professional institutions do not have a proper status in decision making, the process of decision making lacks exterior restrictions, so the direction cannot be well controlled from the basic target, which often results in blindness in decision making. In Shanghai, there is a very typical example. When the leaders from the central government visited the construction of the bridge roads of Shanghai, they criticized the bridge roads as a forest of concrete. Thus, the municipal government decided to build a large green area of 23 hectares at the inter junction between Chengdu Road and Yan39。an Road, which forced 2,800 households to demolish their houses and move away. The environment is important all right， but there is also a need for overall consideration, so as to invest the least and benefit the most. There is no use to mention how much actual benefit it will bring about for improvement of the residential environment of the citizens to open up the green area: even the construction of the green area can really ameliorate the environment, such a cost for the environment will not be able to achieve a balance in benefit by any means, in terms of system engineering. Even though the municipal government has the determination and the economic strength to invest such a huge sum of money, the moving of 2,800 residents is still questionable as far as the society is concerned, and the social impact here can never be weighed in terms of money. Another example is the urban construction of Zhuhai, which is an operation on borrowings: it has spent large funds in the construction of Qinglv Nanlu and Qinglv Zhonglu. As a matter of fact, if we analyze the urban space construction of Zhuhai, we may find the space distribution of Zhuhai is not ideal at all: the entire hinterland of the city lacks spotted public space, lacking urban squares and green areas for the citizens to play and rest. Although the littoral linear space is developed quite well, the entire space allocation of the city lacks an overall consideration. From such examples, we may conclude that a rational overall scheming is of vital importance. A mere participation by professionals in specific project design is far from enough, and such participation must be guaranteed by the management system. Study Feasibility study should be carried out after the setting of the target. It includes technical feasibility, financial feasibility, anizational feasibility, social feasibility and so on. In the practice of urban design of China, owing to the limit of time and lack of awareness, feasibility study is not given enough consideration in many projects. But, with the participation of private institutions in the development in recent years, such work is getting into the right path step by step. Of course, in such development, what is done chiefly is still the financial feasibility study. For example, feasibility study was done in the earlier stage of the development and construction of Xidan Culture Plaza. The idea of construction of Xidan Culture Plaza was proposed and decided by the experts of the former Capital Programming Commission in the Overall Plan of Construction of the Capital at the beginning of the 1980s. With the deep going of the transformation of Xidan Area, the former Capital Programming Commission held two meetings in 1995 to discuss how to carry out this project. In 1997, Xidan Culture Plaza Project was listed into the agenda formally, as one of the gift projects to the 50th National Day. In consideration of the prehensive strength of Huayuan Real Estate Co., Ltd., the government of Western District decided to entrust the project to Huayuan Real Estate Co., Ltd. for execution. Huayuan Real Estate Co., Ltdiii. had pleted many projects in Xidan area, especially the South