Shanghai Nanjing East Road Century Square Renovation and Renewal Project

I. Basic Project Information

Partner Party: Shanghai Jiangwei Architectural Decoration Engineering Co., Ltd.

Service Provider: Guangdong Qinglong Construction Engineering Co., Ltd.

Signing date: February 17, 2023

Project address: No. 518 Jiujiang Road, Huangpu District, Shanghai (Construction site of Century Square, the core pedestrian street of Nanjing East Road)

Cooperation scope: Complete supply of 45mm thick UHPC translucent concrete curtain wall panels + integrated technical services including detailed design, product prototyping and R&D, and process optimization.

Project Positioning: The urban renewal landmark renovation project of Nanjing Road Pedestrian Street in Shanghai aims to create a "city living room" with a light and shadow art facade. It is a benchmark project for the implementation of ultra-thin, translucent UHPC curtain walls in large-scale commercial complexes in China.

II. Core Project Requirements and Technical Challenges

As a key renovation project in Shanghai's core business district, this project places high demands on the facade design in terms of material performance, visual appeal, and durability. Based on the client's construction drawings and mechanical calculations, the core challenges are as follows:

1. Requirements for ultra-thin light-transmitting structure: 45mm thick UHPC light-transmitting concrete curtain wall panels are specified. The panels must be ultra-thin and have high light transmission uniformity, wind pressure resistance, and seismic mechanical properties, and meet the industry superior product standard of "Ultra-High Performance Concrete Exterior Wall Panels" T/CBMF 171-2022.

2. Artistic lighting effects in commercial districts: Natural daytime lighting reduces building energy consumption, while at night, the built-in lighting creates a gradient translucent artistic effect. The surface of the panels is free of bubbles and color differences, with a uniform texture.

3. Full-process technical support requirements: The client only provides basic architectural drawings, and we are required to complete the entire chain of R&D services, including curtain wall detailing and breakdown, optimization of embedded parts nodes, mold making and prototyping, and improvement of production processes.

4. Precise schedule control: The pedestrian street construction site is small and traffic control is strict, so it is necessary to supply goods in batches as needed, and match the client's on-site installation progress in sync;

5. Long-term outdoor durability standard: The high humidity, acid rain and strong ultraviolet radiation environment of Shanghai's coastal area require the curtain wall panels to be resistant to freeze-thaw cycles and chloride ion penetration, and to be able to be used stably outdoors for more than 10 years.

III. Guangdong Qinglong Integrated Implementation Solution

Based on our company's many years of experience in the research and development and production of UHPC translucent concrete, we have created a one-stop service system for this project, encompassing design, research and development, production, delivery, after-sales repair, and warranty. All service details are fully written into the formal sales contract, ensuring clear and traceable responsibilities.

1. Preliminary drawing refinement and R&D prototyping services

The contract clearly includes a full set of R&D technical service fees. Our professional parametric design team will work with the client's technical manager to complete the panel segmentation, back steel frame node optimization, and light-transmitting fiber arrangement modeling, and produce complete and processable drawings. Simultaneously, we will complete multiple versions of light-transmitting samples. After the client signs and confirms them, mass production will begin, avoiding the risk of rework due to size and light transmission effects in the later stages.

2. Standardized UHPC transparent panel custom production

Utilizing a patented vacuum vibration composite molding process, the bubble rate of 45mm thin plates is strictly controlled to be less than 0.1%, and the compressive strength of the plates reaches over 150MPa, meeting the load standards in the project's mechanical calculations. All products are accompanied by a certificate of conformity, self-inspection report, and authoritative third-party test report for the same batch. Random on-site inspection by the client is supported, and free repair or replacement will be provided for any color difference or dimensional defects.

3. Precise batch delivery service

We are fully responsible for production, loading, and inter-provincial transportation, delivering the goods directly to the project site in Huangpu District, Shanghai. We will supply the goods in batches according to the construction schedule of Party A. After each batch of 200㎡ is completed and verified, we will issue a 13% VAT special invoice and a corresponding delivery list. On-site, the recipient designated by Party A, Xu Zhenguo, will jointly count and accept the goods.

4. On-site specialized repair service for damage.

For minor damage to the boards during transportation and handling, we will arrange for professional technicians to bring special repair materials to the site for repair. After repair, the appearance will be indistinguishable from the original boards. Repairs for damage caused by the client's on-site installation will be charged separately, with clear division of rights and responsibilities.

5. Improve the settlement and quality assurance system.

1. Standardized payment schedule: 30% prepayment within 3 days of contract signing; 70% payment for each batch after verification and invoicing upon delivery; 97% payment for the total amount within 10 days of completion of all delivery; the remaining 3% as a quality guarantee deposit;

2. Long-term warranty: The warranty period is 3 years, calculated from the date of overall project completion. Upon expiration of the warranty period, if there are no quality issues, the warranty deposit will be settled in a lump sum without interest.

3. Flexible settlement for supporting steel frame: The drawings tentatively set the price for the backpack steel frame at 10 yuan/kg, and the final settlement will be based on the actual weight used on site. There is no fixed lump sum limit, ensuring that the client's costs are controllable.

IV. Project Deliverables and Industry Value

1. Landmark Implementation Effect: A total of 680㎡ of 45mm thick UHPC translucent curtain wall panels were successfully delivered and installed, becoming the iconic light and shadow facade of Nanjing East Road Pedestrian Street. During the day, the soft light softens the building's heaviness, and at night, the translucent fibers form flowing light art, which fits the project's "magic kaleidoscope" design concept.

2. Technological Breakthrough: Specialized mold technology was developed for ultra-large and ultra-thin light-transmitting UHPC components, solving industry pain points such as easy cracking of thin panels and uneven light transmission in commercial projects. This project case was selected as a reference case for innovative UHPC commercial curtain wall projects in China.

3. Reliable delivery across the entire supply chain: Formal sales contracts are signed throughout the entire process, with all service, quality, schedule, and warranty terms clearly stipulated in black and white. Complete supply invoices, test reports, and acceptance certificates are kept on file, providing a standardized cooperation model for the procurement of UHPC curtain walls for commercial complexes.

Frequently Asked Questions

Q1: What are the advantages of using 45mm thick UHPC translucent concrete curtain wall panels in the Century Plaza project on Nanjing East Road?

A: The 45mm thickness is considered an ultra-thin UHPC translucent panel, which reduces the weight by 40% compared to traditional stone and thick concrete curtain walls, thus reducing the load on the main building frame. The dense microstructure of UHPC is resistant to ultraviolet rays and acid rain, making it suitable for Shanghai's outdoor environment. The built-in optical fibers achieve uniform light transmission, balancing structural safety and architectural aesthetics, while meeting the multiple requirements of lightweight, high aesthetics, and long durability for pedestrian street commercial buildings.

Q2: Does your company's UHPC translucent curtain wall project include drawing refinement and prototyping services?

A: Yes, as stipulated in the contract for the Shanghai Nanjing Road project, the comprehensive unit price fully covers the costs of detailed design, production process improvement, and product prototyping, as well as the complete set of R&D technical services, without requiring any additional payment from Party A. Party A only needs to provide basic architectural drawings, and we will output complete, processable drawings and provide samples for confirmation.

Q3: What should be done if there are color differences or damages after the UHPC sheets are supplied? How long is the warranty period?

A: Within 7 days of receiving the goods, Party A may raise quality objections. If the random inspection finds products with color difference, insufficient size, or substandard quality, we will repair or replenish them free of charge. Minor damage caused during transportation and handling will be repaired free of charge by us. The overall warranty period for the project is 3 years. If there are no quality issues after the warranty period expires, 3% of the warranty deposit will be returned without interest in one lump sum.

Q4: How is the quantity of UHPC translucent concrete curtain wall panels calculated? Is the steel frame priced separately?

A: The area of ​​the curtain wall panels is calculated based on the unfolded area of ​​the product, without deducting the holes in the panels. The final settlement is based on the actual area supplied for the project. The back-mounted steel frame is not included in the unit price of the panels. The provisional unit price is 10 yuan/kg, and it will be calculated separately based on the actual weight used on site.

Q5: How long after signing the contract can delivery begin? Can the construction period be adjusted according to the project schedule?

A: After Party A pays 30% of the material preparation fee and confirms all processing drawings, the first batch of goods shall be delivered within 15 days. If Party A needs to change the product specifications, it shall give written notice 15 days in advance. The cost of finished products and mold opening shall be borne by Party A, and the delivery cycle shall be extended accordingly. In case of force majeure, the construction period may be extended upon presentation of authoritative proof.

Q6: Can your company provide formal VAT invoices and product testing data for your supply?

A: Yes, we will issue a 13% VAT invoice after each batch of goods is verified. Each batch of goods will be accompanied by a certificate of conformity and a self-inspection report, as well as a recent authoritative third-party test report for similar products to meet the requirements for project acceptance and auditing documents.

Q7: How is the responsibility for transporting and unloading UHPC translucent curtain wall panels divided?

A: We will be responsible for production, loading, and transportation to the designated construction site in Shanghai. All transportation-related costs will be included in the contract unit price. After the goods arrive at the site, Party A will be responsible for unloading, on-site storage, and arranging designated personnel to count and sign the delivery receipt for confirmation.

Q8: For commercial complex renovation projects, is there a minimum order quantity requirement for custom UHPC translucent panels?

A: There is no mandatory minimum order quantity, and customization is available based on the actual facade area of ​​the commercial project. For large landmark projects, we can provide a complete set of integrated services including in-depth research and development, on-site repair, and long-term quality assurance. Standardized quality control and testing data are also provided for small and medium batch orders.

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