The bids involve a total investment of over 3.3 billion yuan ($460 million) and a total length of 20.47 kilometers, and have challenges including overpass building and various resettlement work.

这些投标总投资超过33亿元人民币（4.6亿美元），全长20.47公里，面临着包括立交桥建设和各种移民安置工作在内的挑战。

"The underground overpass section has a length of merely 77 meters but saw additional participation of five technical institutes from Shanghai and construction simulation countless times due to complicated geological conditions, especially the silt-sand mix stratum, which was quite a headache to address.

“地下立交桥段只有77米，但由于地质条件复杂，特别是粉砂混合地层，上海五家技术机构多次参与施工模拟，这是一个令人头疼的问题。

Before daily operations begin on Thursday on the Beijing-Shanghai Railway and the Shanghai-Nanjing Intercity Railway, an overpass of Benfa Road in Changzhou, Jiangsu province, can be seen above the rails of the two busiest railways, which marks not only a milestone for the road project as it is a success after numerous challenges, but also another valuable example for all other construction teams facing similar technical issues nationwide.

在周四京沪铁路和沪宁城际铁路开始日常运营之前，江苏省常州市本发路的一座立交桥可以在这两条最繁忙的铁路的铁轨上方看到，这不仅标志着该道路项目的里程碑，因为它在经历了无数挑战后取得了成功，也是全国面临类似技术问题的所有其他施工团队的又一个宝贵例子。

CR24, the builder of the bridge, attributes the construction success of the overpass section to its tailor-made solutions using steel box girders and digitalized tools.

该桥的建设者CR24将立交桥段的施工成功归功于其使用钢箱梁和数字化工具量身定制的解决方案。

Bringing no disruptions to normal operations of the two railways, the builder managed to have tons of steel box girders "gently walk" 86 meters to their destinations, with errors controlled within only 3 millimeters, said Xie Yuanfang, a project designer with the CRCC, adding that to safeguard the daily operations of the neighboring railways, each of which has more than 110 trains running through, CR24 construction workers can only take advantage of hours-long train maintenance time to build the overpass section every day.

中国铁建的项目设计师谢元芳说，在没有中断两条铁路正常运营的情况下，建设者设法让成吨的钢箱梁“轻轻地走”86米到达目的地，误差控制在3毫米以内。他补充说，为了保障相邻铁路的日常运营，每条铁路都有110多列列车通过，CR24的施工人员每天只能利用长达数小时的列车维护时间来修建立交路段。

"Construction of the overpass section, which is 65 m long, 28.9 m wide, 2 m high and weighs 1,453 tons, was achieved with the help of two 150-ton jacks, and 400-ton and 600-ton heavy object movers each of four.

“立交桥段长65米，宽28.9米，高2米，重1453吨，是在两台150吨千斤顶和四台400吨和600吨重物搬运机的帮助下完成的。

In addition to sealing a deal worth $3.02 billion for the rehabilitation and reconstruction of the Nigerian Eastern Railway from Port Harcourt to Maiduguri in the West African country in April, the Chinese mega construction service provider said it successfully completed 2,200 square meters of concrete pouring within 24 hours for the Iyana Iba Overpass of the Badagry Highway Project in Nigeria in early September.

The Iana Iba Overpass of the Badagry Highway is located at the Iana Iba Farmers Market in Lagos State, Nigeria.

The Iyana Iba Overpass is a subproject of the Badagry Expressway, and the Badagry Expressway project is a big-ticket infrastructure project planned by the Nigerian government.

The SOE said it recently commenced construction of a key overpass in the city.

"After thoroughly studying the feasibility of construction, the project team made detailed plans for each minor step, and arranged technicians to conduct full-time oversight of the building process to guarantee safe construction of the overpass and safe operation of the rail line," Li said.

With girder installation now steadily progressing forward, the overpass, with an investment of 390 million yuan ($56.8 million), is expected to open to traffic by October, and play a key role in facilitating movement between old and new urban areas of the city, CR24 said.

Builders of some super projects, including the Beijing Workers' Stadium reconstruction, Beijing's subcenter theater, the Guiyang Qianchun overpass and the Universal Beijing Resort, will showcase their experiences using intelligent manufacturing tools at the fair.

The State contractor has also participated in the construction of the G104 national expressway, which is currently on a steady track as the building of an overpass part above the operating G15 Shenyang-Haikou expressway is progressing steadily.

CR24 said it recently completed building the substructure of the overpass above the Ningbo-Taizhou-Wenzhou part of the G15, which is a major vertical line in the national highway network.