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中西部商品交易中心（简称MCEC）是位于西安国际港务区的金属制品贸易中心。该中心被看作中国新丝路发展战略的基础设置。整个中心共由7个建筑组成，最引人瞩目的就是A,B,C三座塔楼组成的楼群，其中中心的B塔楼被烙上耀眼的金印。7座建筑组成层次丰富的建筑群，随着人在城市中不同的位置发生着变化。

MCEC (Midwest Commodity Exchange Center) is a trade center for metal products located at a center of Xi’ an International Trade & Logistics Park. This region is positioned as one of regional headquarters of China’s New Silk Road, and a new urban development has recently started there. MCEC has a rich historical and cultural background of Silk Road, and the urban landscape as a landmark representing international trade with the new transportation infrastructure is expected for MCEC.

MCEC is composed of seven buildings which can be categorized as follows: “bridge” buildings representing connection between south-north and east-west transportations, namely Towers A, C, D, and E; “gold seal” buildings representing fair international trades, namely Tower B; and “gate” buildings, which are a pair of hexagonal columns representing the new urban development, namely Towers F and G. Generating complex silhouettes, these buildings express the dynamic sequence of urban landscape that changes constantly in all directions according to the shifting viewpoints in motion.

MCEC的主要功能是交易中心和会议服务设置。 A / B / C三塔建筑群和D / E 建筑群下方的裙楼高达5层，铸就了5层高的内部开放空间。另外F / G各自独立存在，与景观直接联系。B塔的外表皮变幻莫测，上面的金色表皮造型呈蜂窝状。因为这事金属交易中心，所以建筑设计上也引用了与金属有关的概念：B塔为“金”；A, C, D, E为“铂金”； F, G为“青铜”。除了B栋，其余每栋建筑的幕墙采用丝网印刷玻璃作为造型中的跃动元素，这些玻璃背后藏有led照明。在夜间，流光掠影，形成壮观活跃的城市景观。

MCEC consists of service facilities for the main functions including trade rooms and conference rooms. Towers A / B / C and Towers D / E are continuous building to be dynamically connected by semi-exterior entrance hall with each 5-story high open space and glass roof. Towers F / G are independent administrative buildings, and in both buildings it is directly accessible from the south and north entrances located in the impressive entrance hall with 2-story open space.

Tower B, accommodating the operational headquarter of MCEC, is clad in three-dimensional façade expanding upwards with irregular patterns. Its curtain walls of the honeycomb design visualize the network patterns. The other six towers are clad in flat SSG curtain walls assembled in various angles, reflecting the honeycomb patterns. In addition, they interconnect the inside and the outside while activating the space for trade activities.

We set special design codes for these buildings dealing in metal products; the curtain walls should be designed based on the metallic ratio. The golden ratio is applied to “golden seal” building (Tower B); the platinum ratio to the “bridge” buildings (Towers A, C, D, and E); and the bronze ratio to the “gate” buildings (Towers F and G). In addition, each façade is divided in different sizes according to the orientation. The “dot lines” on the façade are made of silk-printed glass with shading louvers equipped with internal LED lighting. At night, fragments of light stream along the façade according to the special lighting program move, and such transformation on the façades create a spectacular and active urban landscape.

Credit Information
Architecture : Interdesign Associates + Hugo Kohno Architect Associates
Associate Architect, Structural & Mechanical Engineer : China United Northwest Institute for Engineering Design & Research
Interior Design : Hallucinate Design Office
Landscape Design : Hyder ACLA Consulting (Shanghai) Limited

Photography :Interdesign Associates
Javier Callejas Sevilla & Courtesy of Hallucinate Design Office

Project Outline
Location : No.99 Gangwu Avenue, Xi’an International Trade & Logistics Park, China
Date of Completion : Dec. 2015
Principal Use : Commodity trading center
Structure : reinforced concrete, steel
Site Area : 75,580m2
Building Area : 16,300m2
Total Floor Area : 326,200m2 (72,500m2 / BF, 253,700m2 / 1〜22F)

Material Information
Exterior Finish : Glass curtain wall, Aluminum panels
Floor : Artificial stone, Carpet, Hardwood flooring
Wall : Aluminum plate, Artificial stone, Acrylic plate & Quadrate pipe aluminum wall
Ceiling : Mineral wood board, Aluminum plate

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MCEC Midwest Commodity Exchange Center, China by Interdesign Associates + Hugo Kohno Architect Associates