The name of C-House comes from our basic design logic, a combination of a compact cube and an integrated core. The core integrates all services, including kitchen, bathroom, toilet, equipment rooms, stair, and enclosures around the core to form a general space. Around the core C-House space is free and flexible, combined with modular and variable furniture design, not only innovated the use of traditional building limits, but also brought the use of space complex variable.It can also be used as a multi-purpose, multi-functional shared space to accommodate residential, residential office, community services and exhibition and other multi-purpose variable functions, and combined with modern intelligent capacity and energy, like a concept car, provided a future-oriented concept house, and started the mode of displaying concept house .

C-house is a small energy station that can generate electricity. It integrates 140 thin-film cells and 60 monocrystalline silicon solar cells on the roof on three sides of a compact cubic enclosure to form a continuous energy skin, demonstrating an advanced BIPV (photovoltaic building integration) housing system suitable for Chinese national conditions and becoming photovoltaic building integrated housing products with unique characteristics and broad market prospects. In fact, under good weather conditions, C-House generates more than 150  degrees of electricity, making it a truly small power station. Adequate and adjustable energy can be supplied to the public grid in addition to self-sufficiency, which achieves energy sharing , intelligent production and energy use.

C-House completed all the construction tasks in 20 days, and put into use high-performance housing, such construction speed technology support from the the  national invention patent high-speed assembly building housing system key technology obtained by School of Architecture, Southeast University. C-House adopted the construction method of full prefabrication and assembly, and all the main components of the house are processed and formed in the factory, assembled into integral large components on the spot and hoisted, which greatly reduced the workload at high altitude, speeded up the construction speed and ensured the construction safety; the core  components were prefabricated in Germany and shipped to assembly in Dezhou. With the support of this construction technology, the C-House roof was sealed in two and a half days, and the all-weather construction site was quickly formed to ensure the safe and efficient follow-up construction.

It is the foundation of the whole life cycle management of building components to make use of the assembled building information platform developed by the team and with independent intellectual property rights to make the component model generate two-dimensional code which represents the identity and uniqueness of components. During the construction of C-House, the next day's project schedule is derived from BIM model every day, so that each sub-project leader is aware of their own and other people's work, the overall construction progress is controlled, according to the actual situation, make timely adjustments to control the construction progress.

Glass in C-House is developed by Professor Fu Guodong from the School of Chemistry and Chemical Engineering of Southeast University and patented. It is a kind of smart thermosensitive glass which combines climate control dimming film with ordinary glass sandwich. Climate control dimming glass with vitality, can feel the intensity of light and temperature, and according to this change to adjust the color depth independently. In summer, when the outdoor temperature is high, the glass absorbs light and heat surface temperature, the color deepens automatically, and blocks the heat from entering. In winter, when the outdoor temperature is low , the glass surface temperature is low, and the color is light, which increases the light and heat entering, and improves the comfort of indoor light. In this way, the intelligent glass to achieve summer insulation, winter heat, become a comfortable indoor intelligent skin. Smart glass makes buildings warm in winter and cool in summer. 

Team TUBSEU adopted the small and dispersive sewage treatment system developed by Professor Lu Xiwu , School of Energy and Environment, Southeast University. The system aims to achieve energy-saving, efficient and stable effluent quality of sewage treatment. With the concept of advanced gray-black separation and combination of biological and ecological treatment processes, the bio-ecological combined sewage treatment process of high-efficiency folding anaerobic reactor - anoxic regulating tank - waterwheel driving biological turntable - landscape type constructed wetland is proposed. The organic matter in the sewage is mainly removed by the biological treatment unit, and the nitrogen and phosphorus nutrient salt is resource-utilized in the ecological treatment unit by the filtration, adsorption and absorption processes of the substrate and the plant root. After the sewage in the house is treated, it can reach Standard A of the first class in Discharge standard of pollutants for municipal wastewater treatment plant(GB18918-2002). Various pollutants in sewage are also fully utilized：Carbon source are used to produce biogas and nitrogen and phosphorus are used as fertilizers to cultivate plants and build ecological landscapes. In addition, the treatment system has a small area, simple construction, excellent treatment effect, especially suitable for sewage treatment in rural area, to solve the problem of sewage treatment in rural areas.

华炯先生及夫人亲自加工制作秸秆砖并指导学生进行砌筑实验

Mr. Hua Jiong and his wife processed straw bricks in person, and instructed students to carry out masonry experiments

The landscape wall on the outside of the C-House site is made of more than 2,500 pieces of straw bricks. The construction is completed by a trained team of students. The research and manufacture of straw brick benefit from many years of research on straw resource utilization by Mr. Hua Jiong, non-governmental green low-carbon technology promoter . Unlike the traditional construction method, the straw brick replaces the traditional clay brick and other building materials with large carbon emissions, and achieves low carbon emissions and low energy consumption in the early stage of construction. It also provides solutions and methods of the comprehensive utilization of straw resources in rural areas.

Through the dinner activities, let us taste the delicacies of different countries and understand different eating habits; we carry out discarded plastic bottles DIY activities, combining green low-carbon with people's daily life , so that more people use practical action to help  low-carbon; In afternoon, August 16th , in the common hall of the competition venue, we held Qikang academician painting exhibition. At the exhibition, Professor Zhang Hong instructed students to copy Academician Qikang's pen paintings and presented the first monograph on component-based architectural design by the Southeast University team  Component Forming, Positioning, Connecting and Spatial and Formal Generation - Example of Industrialized Design and Construction of New Architecture  to the students. We appreciated the art of pen paintings by the older generation of Chinese architects, and make us learn the knowledge and content of Next Generation Architecture. In the evening of the same day, TUBSEU organized a series of activities, such as Movie Night, DJ Night, and so on. The scene was very exciting, so that we can understand Chinese and Germany culture in the joy and the charm of multiculturalism. These activities promoted exchanges and interactions among students from different countries and universities, and provided opportunities and platforms for the joint promotion of global sustainable development. This was also one of the original purposes and charms of Solar Decathlon China 2018.

In particular, thanks to all the Chinese and German instructors and sponsors who have silently paid for the competition in the past three years.Thanks to Nanjing Changjiang River Architectural Design Co., Ltd. for their full support and assistance in the fields of capital, technology and work coordination, thanks to Nanjing Si Dan Ding Construction Technology Co., Ltd. for strong support and assistance in the process of construction and construction, and thanks to HiMin Solar Group for its support and assistance in engineering sites and housing.

The team can not achieve results without your support and help, I hope this is only the beginning, in the exploration of the future of high-quality, green ecological development, we can work together to create a win-win, sustainable development for the future.