Located in Longgang District of Shenzhen City, the project covers 8 sub-districts, 44 sub-projects, 114,000 households and a total investment of about CNY 795.552 million yuan. The project, upon its completion, has laid a solid foundation for Longgang District to achieve the goal of eliminating gas cylinders by the end of 2023.

The project sees a total investment of about CNY 701 million yuan. Its main construction contents include water intake engineering, water distribution network and water purification plant project. Its water source is located in the main stream of Xiangjiang River at Wanhe Village in Jinghe Township, with a construction length of 34.73 km and a water supply capacity of 100,000 m³/d.
Since the full commencement of Xiangyin Water Supply Plant project on March 6th, 2021, the project team confronted many difficulties, such as large workload, multiple units and tight construction period. They deployed the backbone, remained on the construction site, and successively overcame a series of difficult nodes, such as temporary land acquisition, river crossing, house demolition and relocation, and operation under high-voltage power lines.Upon its operation, the project will comprehensively increase the water supply quality and capacity in urban and rural areas of Xiangyin, promote the penetration rate of rural tap water, and enhance the weak link in drinking water facilities of Xiangxian County. The project will also reinforce the ability to ensure safe drinking water so that 400,000 urban and rural residents in Xiangyin can drink safe water. As a key livelihood project in the urban and rural water supply integration strategy, the project will play a crucial role in coordinating urban and rural development and accelerating rural revitalization in Xiangyin.

The PPP project for integrated traffic hub of Wenling Station is located at the Railway New District of Wenling City, Zhejiang Province, with a total construction area of 108,800 m2. The project mainly includes four sub-projects: The east square hub, the supporting housing for rail transit, the bus transfer center and the parking building.
Facing the challenges like the wide work plane, the large volume of steel structure and the great number of buildings / structures, STEC made early plans and careful preparation. It escorted the construction of steel structure through early survey, GPS positioning, BIM simulation, advance deepening and refining of steel structure process. During the construction of deep foundation pit, STEC actively dealt with complex geological conditions, difficult support, super typhoon and other adverse factors. Thus, it ensured that the land subsidence, the maximum settlement of ramp pier and station pier column were in their controllable ranges, and guaranteed the safe operation of railway. STEC has made joint and practical efforts to construct a new traffic pattern and secured the largest and most beautiful city entrance for Wenling.

STEC Urban Operation establishes the bridge operation mode, strengthens the operation standard and improves the operation concept for the Hong Kong-Zhuhai-Macao Bridge Administration Bureau through comprehensive and in-depth consultation services from multiple perspectives of the document system for operation standards, the organizational framework and staffing, the management system, the technical document system, the outsourcing management, the government affairs linkage, the comprehensive development, etc. Those efforts contribute to the smooth transition of the Hong Kong-Zhuhai-Macao Bridge from the construction period to the operation period, and provide a strong technical service support for the safe, orderly and efficient operation of the facility during the subsequent trial operation period.

The platform is a comprehensive urban grid management system integrating road network facility management, emergency resource management, maintenance plan management, operation monitoring management and emergency management, so as to control the operation status of road network facilities in megacities in real time and comprehensively, and greatly improve the operation and maintenance service level of urban transportation infrastructure. The platform has digitized the documentation of 1,900 km of road, bridge and tunnel infrastructure, deployed the fine management of 10-meter-level road network, managed 5000+ users, 2000+ suppliers, 2000+ professional vehicles and 200+ maintenance bases with mature big data management and decision-making mechanism, processed 5TB of data annually, received 200,000 work orders and handled 100,000 incidents. The data accumulation and management mode has been continuously iterated and optimized. The overall control of urban operation safety, operation efficiency and facility safety state has been improved, the human cost expenditure has been greatly reduced, the management resources and cost input have been optimized, and the digital transformation and high-quality development of urban operation management have been supported.

In this project, the world-leading VSM sinking shaft tunneling technology is adopted to "dig" a three-dimensional space for 200 small vehicles in a narrow area of 390 m2. On average, it takes only 1.95 m2 of ground space to park one vehicle. Citizens can gain access to their vehicles via the landscape entrance and exit on the ground. It takes them as little as 90 s to receive a high-quality parking experience. This project provides experience and reference for the intensive use of urban land resources, the development and utilization of underground space, and the expansion of effective supply of parking facilities.
The UP intelligent parking scheme proposed by STEC conforms to the development trends, such as "smart city" and “Internet +”, and fully draws on the experience and exploration on domestic and foreign solutions for parking difficulties. Public hot spots, such as downtown areas, see large flow of people and vehicles, dense layout of old buildings and tight surrounding land resources. In view of those urban difficulties, STEC creates the "three new" intelligent parking system that integrates new technology, new platform and new mode so as to solve the parking difficulty and fully activate the service efficiency of UP underground garage.

The airport connection line project in urban rail transit line of Shanghai Metro has a total length of 68.6 km and passes through Minhang, Xuhui and Pudong Districts, with 9 stations throughout the line. The project is scheduled to be completed for operation in 2024. At that time, the transit time between Hongqiao Airport and Pudong Airport is expected to be within 40 minutes. The airport connection line project is the first rail transit project that connects the national railway in China. As an east-west fast track connecting Hongqiao hub and Pudong hub, the project contributes to enhancing Shanghai radiation and service functions to the Yangtze River Delta. It provides strong support for Shanghai to improve its urban capacity level and core competitiveness, and to implement the national strategy of integrated development in the Yangtze River Delta. STEC undertook the construction tasks at Sections 3, 4, 5 and 12 in the airport line. They involve difficulties and highlights in ultra-low altitude construction work, super-deep diaphragm construction, ultra-long precipitation, super-large foundation pit construction, ultra-high structure construction, ultra-close crossing, internal assembly construction with fully prefabricated tunnel segments, etc.

Shenkun Road parking lot and comprehensive upper cover development project is an integrated TOD development project containing municipal railway, urban rail transit, medium volume bus, business community development and other functions. It is not only an important hub project for the comprehensive transportation development in Shanghai during the “14th Five-Year Plan” period and the "Five New Cities" comprehensive transportation system framework, but also another crucial connectivity project for the Yangtze River Delta integration and Hongqiao International Open Hub strategies.
The project is located in the core area of Shenkun Road, the "South Gate" of Shanghai Hongqiao International Open Hub, with a total construction area of over 500,000 m2. It is close to Hongqiao traffic hub in the north, adjacent to the completed Huaxiang green land in the west, and located at the intersection node between airport contact line and Jiamin Line. It serves as a crucial node for the near Shanghai area to access the municipal railway network in the future.
STEC possesses a lot of construction and management experience in the simultaneous construction and transformation of rail transit engineering and building complex, the supporting municipal engineering, the advantages of the whole industry chain, and the experience in industry resource integration. It continues to deepen the TOD project construction and management system during the construction period so as to provide reference for the construction of Shanghai rail transit complex.

Channel improvement of Chuangxin River in Zhangjiabang Wedge Green Belt (Cuibai Road - Niuqiao Port) and Niuqiao Port (Majiabang - Guanglan Road) is located in Jingang Road of Pudong New Area. The improvement center covers a total length of 1,152 m, among which the length of channel to be improved in the Chuangxin River is 529.2 m. The reach starts from Cuibai Road in the north and ends at Niuqiao Port in the south. The length of channel to be improved in Niuqiao Port is 622.8 m, which starts from Majiabang and ends at Guanglan Road. In this project, STEC constructed about 2, 300-meter revetment, 3,000-meter flood control channel and 13,800-square-meter green space.
The improved Chuangxin River in Zhangjiabang Wedge Green Belt and river channel at Niuqiao Port demonstrate the unique landscape charm of ecological banks with their brilliant ecological appearance. Meanwhile, the project can revitalize the regional water systems, create a natural, comfortable and pleasant river landscape, and further improve the regional capacity for flood control, water logging removal, irrigation regulation and storage. It not only enhances the natural environment on the surrounding land but also "refresh" the life of local residents.

With a total length of 15.3 km and a water retention capacity of over 700,000 cubic meters, the deep drainage and storage pipeline system engineering of Suzhou River serves as a key link for Shanghai to systematically develop its in-deep underground space for the first time and to construct "sponge city". The capacity of drainage system along the Suzhou River can be promoted from once every year to once every five years after the whole project is completed. In this way, Shanghai can effectively address the once-in-a-century rainfall and basically eliminate the initial rainwater contamination along the Suzhou River. The Miaopu experimental section undertaken by STEC is as long as 1.61 km. The buried depth of the tunnel will be from 42 m to 60 m. In this experimental section, STEC constructed a round shaft foundation pit as deep as 56.6 m, the deepest foundation pit in soft soil in China. Ultra-deep shaft construction technology is becoming the benchmark for similar projects in the future. It will provide referential significance for the future development and utilization of underground space.

Section II (Shaodu Road - Guangyuan Avenue section) of Yunfei Road Phase II (Shaodu Road - Middle Hongtang Road) project covers a total length of 1670.56 m. The main construction comprises road engineering, operation maintenance engineering, drainage engineering, bridge engineering, etc. The section II of civil engineering construction of Yaojiang New Area Utility Tunnel Phase I (Yunfei Road) is a trunk-type comprehensive utility tunnel established under the sidewalk, the non-motor lane and the separation belt (biological retention zone) on the north side of Yunfei Road.
This project belongs to the joint construction of road and utility tunnel, which has the following difficulties. First, the excavation depth of utility tunnel foundation pit should be 5 to 10 m; the tunnel crosses 3 rivers in total so the foundation pit must be excavated with safety. Second, the waterproof grade for tunnel in this project is grade two so the main body of the project has a high waterproof requirement.
After completion, the project will drive the development in Yaojiang New Area and promote the new urbanization and the modernized urban construction in Yaojiang New Area. It will improve the comprehensive carrying capacity of urban infrastructure and facilitate the comprehensive utilization of underground space resources.

Located in Foshan City, Guangdong Province, the project comprises a pipeline as long as about 23 km, the expansion of Xiqiao pressure-regulating station, and the construction of Jinben pressure-regulating station. The total investment of this bid section is about CNY 525.16 million yuan. The project will be connected with the existing high-pressure pipe network system in Foshan, so as to construct a north-south gas transmission channel and to connect the downstream urban medium-pressure transmission and distribution system. The project will meet the gas demand from various urban gas users in this region, strengthen the stability and security of gas supply, and facilitate the development in low-carbon energy.