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Qingxichuang Restoration July 2003, Seoul started the "Qingqichuan Restoration" with the project, determined to restore this ancient city on the ecology and history of style, construction of traditional and modern illuminated "cultural city." September 2005, lasted 26 months, with a total investment of 3.9 billion won in the "Qingxichuan Restoration Project" completed. Removal of the towering viaduct, removed the massive cement covered river, perennial riverbed silt cleared the dregs. From the Han River water, purified by pumping into the full 5.8 km of the Qingxichuan river, note 98 thousand tons of water daily, plus purification of the 22,000 tons of water the city subway, the total injection capacity of 120,000 tons, allowing river to maintain water depth of 40 cm. Dried for several decades, become the underground Ditch finally restored Qingxichuan "Qingxichuan" in this appearance. To make Qingxichuan protection, management and exploitation, set up a special organization Qingxichuan Management Center, operated by the management group planning, business operation, advertising and venue management and use of a variety of performances, cultural activities, recruitment, organization etc.; Facilities Management Section is responsible for facility inspections, maintenance and management, disaster prevention and snow removal and various security checks and security assessments; ecological Qingxichuan Management Section is responsible for water quality, environmental monitoring, environmental impact assessment, ecological protection and green space maintenance and management. Three departments clear division of labor, organic co-care is good, good job, good use of Qingxichuan, this concerted effort to maintain the best ecological river.

Be in prompt development of computer and universal today, also basic change happened in the confidential enterprise commerce carrier , the form stores namely from paperback memory to electron data. Any object is developed having dual character without exception, clandestine betraying confidential matters of commerce becomes easier to be , strike the once mouse bid sometimes as long as burning, the enterprise commerce secret is not bad besides propagation arrives at long distance, therefore, before computer bring to the enterprise head and shoulders above others's when facilitating, the also feasible enterprise commerce secret protects circumstances becoming extremely austere , enterprise should pay attention to protecting the commerce secret , take effective measures in the process of computer usage highly , prevent the commerce secret from disclosing. The main body of a book clandestine protection of commerce has set forth self viewpoint to the network under the environment , the commerce secret has protected the viewpoint bringing forward self from knowing the lower commerce of network environment secret what to be to how to reinforce a network under the environment.